What is the minimum lens size (in meters) that will permit just resolving 2 stars 1.1 second apart using light of 510nm?
19,933 results
calculus
If f is the focal length of a convex lens and an object is placed at a distance p from the lens, then its image will be at a distance q from the lens, where f, p, and q are related by the lens equation 1/f = 1/p + 1/q What is the rate of change of p with

calculus problem
the thin lens equation in physics is 1/s+1/S=1/f where s is the object distance from the lens,S is the image distance from the lens,and f is the focal length of the lens.Suppose that a certain lens has a focal length of 6cm and that an object is moving

Physics  Optics
A photographic slide is to the left of a lens. The lens projects an image of the slide onto a wall which is a distance of 5.94 m to the right of the slide. The image is larger than the size of the slide by a factor of 82.0. How far is the slide from the

optics
A thin, doubleconvex lens has a refractive index of 1.50. The radius of curvature of the front surface is 15 cm and that of the rear surface is 10 cm. See sketch. (a) How far from the lens would an image of the sun be formed? (b) How far from the lens

physics
A converging lens (f1 = 24.0 cm) is located 56.0 cm to the left of a diverging lens (f2 = 28.0 cm). An object is placed to the left of the converging lens, and the final image produced by the twolens combination lies 20.3 cm to the left of the diverging

Physics
An object is placed 20.0 cm from a thin converging lens along the axis of the lens. If a real image forms behind the lens at a distance of 8.00 cm from the lens, what is the focal length of the lens?

Physics
The following four lenses are placed together in close contact. Find the focal length of the combination. Lens 1 F'= +200mm Lens 2 F'= 125mm Lens 3 F'= 400mm Lens 4 F'= +142.9mm

science
A thin, doubleconvex lens has a refractive index of 1.50. The radius of curvature of the front surface is 15 cm and that of the rear surface is 10 cm. See sketch. (a) How far from the lens would an image of the sun be formed? (b) How far from the lens

Algebra Linear Inequalities Help
Jerry is running away from Tom, who is 5 meters behind, at a speed of 2.5 meters per second. To catch Jerry before he reaches his hiding spot that is 10 meters ahead, what must Tom's minimum speed be? 5 meters per second 3.75 meters per second 7.5 meters

calc
If f is the focal length of a convex lens and an object is placed at a distance p from the lens, then its image will be at a distance q from the lens, where f, p, and q are related by the lens equation 1f=1p+1q What is the rate of change of p with respect

calculus
A convex lens of a focal length f can be defined by the lens equation 1/f=1/p + 1/q if an object is a distance p from the lens, then the distance q from the lens to the images. For a particular lens, f=2cm and p is increasing find 1. a general formula for

physics
A CONVEX LENS PRODUCES O REAL AND INVERTED IMAGE 2.5 TIMES MAGNIFIED AT A DISTANCE OF 25CM FROM THE LENS.CALCULATE THE FOCAL LENGTH OF THE LENS,

physics
Certain neutron stars (extremely dense stars) are believed to be rotating at about 0.76 rev/s. If such a star has a radius of 10 km, what must be its minimum mass so that material on its surface remains in place during the rapid rotation? i got

Astronomy
1. When comparing the sizes of stars, our Sun is: a.) the largest star discovered to date b.)one of the larger stars discovered to date c.)medium size as compared to other stars d.)one of the smallest stars discovered to date My answer: c or d 2. What

Physics
When a converging lens is used in a camera (as in the first drawing), the film must be placed at a distance of 0.240 m from the lens to record an image of an object that is 4.30 m from the lens. The same lens is then used in a projector (as in the second

Physics
A convex lens forms a real image 6 times the size of the object. The distance between object and image is 33 cm. Find the focal length of the lens.

Science
Which sentence accurately describes star clusters? Stars appear brighter. Stars form large groupings. Stars form at different times. Stars form from different nebula.

Physics
A converging lens (f1 = 24.0 cm) is located 56.0 cm to the left of a diverging lens (f2 = 28.0 cm). An object is placed to the left of the converging lens, and the final image produced by the twolens combination lies 19.7 cm to the left of the diverging

Physics
Two systems are formed from a converging lens and a diverging lens, as shown in parts a and b of the drawing. (The point labeled "Fconverging" is the focal point of the converging lens.) An object is placed inside the focal point of lens 1 at a distance of

Help Calulus
A. If the focal length of the convex lens is supposed to be 5 cm, and if the image is formed 7 cm from the lens, find the distance, p, from the lens to the object. (It’s not necessary to simplify your answer.) Equation: 1/p + 1/q = 1/f

Physics
The crystalline lens of the human eye is a double convex lens made of material haveing an index of refraction of 1.44. Its focal length in air is about 8 mm which also varies. We shall assume that the radii of curvature of its two surfaces have the same

Physics
A simple camera telephoto lens consists of two lenses. The objective lens has a focal length f1 = +41.7 cm. Precisely 36.1 cm behind this lens is a concave lens with a focal length f2 = 13.9 cm. The object to be photographed is 4.06 m in front of the

Statistics
In a prior sample of U.S. adults, the Center for Disease Control (CDC), found that 10% of the people in this sample had pinworm but the margin of error for the population estimate was too large. They want an estimate that is in error by no more than 1.5

Physics(Thank you)
1)Which of the following objects can set fire to a piece of paper in the presence of sunlight? A)doulble concave lens B)convex lens C)convex mirror D)concave lens B, convex lens 2)What happens to a path of a light ray parallel to the principle axis, after

science !!
1. how do scientists classify stars? by size distance and color by size distance and brightness by color brightness and distance by size brightness and temperature 2. which of The following factors determines how long is Star will live a stars color stars

Physics
An object is placed to the left of a lens, and a real image is formed to the right of the lens. The image is inverted relative to the object and is onehalf the size of the object. The distance between the object and the image is 95 cm. (a) How far from

AP Physics B
An object is 21 cm in front of a diverging lens that has a focal length of 10 cm. How far in front of the lens should the object be placed so that the size of its image is reduced by a factor of 1.5?

Physics
An apple is placed 17.0 cm in front of a diverging lens with a focal length of magnitude 23.2 cm. What is the image distance i of the image of the apple through this lens? What is the magnification of the image of the apple? Wwhich of the following

Optics (Physics)
3) Find out the Focal length for the following lenses (in all cases, the lens is made of a glass with index of 1.5): a) Biconvex lens with R, v 30cm.V R, V 20cm, b) Planarconcave lens with radius of Rv 50cm, c) Meniscus convex lens with R v 30cm, R, V

Physics
An office copier uses a lens to place an image of a document onto a rotating drum. The copy is made from this image. (a) What kind of lens is used? Should it be 1  converging, or 2  diverging? Suppose the lens has a focal length of magnitude 13.0 cm. If

science
An HR diagram? Answer Are Is a map of the position of the stars Graphs stars according to their size and distance List every known star Graphs a sample of stars according to surface temperature and absolute brightness Thank You

algebra 1
A Fisheye lens has a minimum focus range of 13.5 centimeters. If 1 centimeter is equal in length to about 0.39 inch what is the minimum focus range of the lens in feet

PHYSICS
AN OBJECT OF HEIGHT 5 CM IS PLACED PERPENDICULAR TO THE PRINCIPAL AXIS OF A CONCAVE LENS OF FOCAL LENGTH 10 CM .IF THE DISTANCE OF THE OPTICAL CENTRE OF THE LENS ES 20 CM .DETERMINE THE POSITION ,NATURE AND SIZE OF THE IMAGE FORMED USING THE LES FORMULA.

physics
Certain neutron stars (extremely dense stars) are believed to be rotating at about 100 rev/s. If such a star has a radius of 10 km, what must be its minimum mass so that material on its surface remains in place during the rapid rotation?

Physics
An image of a candle is produced by a convex lens 14 cm away. If the focal length of the lens is 7 cm, how far from the lens is the candle placed? (USe the thin lens equation) For this question, how would you know whether the image is virtual or real?(in

Physics
The main factor that determines the properties of an image produced by a converging lens is A) the shape of the object. B) the color of the object. C) the size of the object. D) the position of the object relative to the lens. E) the bending strength of

Physics
An object is placed 30mm in front of a lens. An image of the object is located 90mm behind the lens. a) Is the lens converging or diverging? explain. b) What is the focal length of the lens? c) Draw a diagram with lens at x=0, locate the image. d) Is the

Physics
i have a question on thin lens equation how do i know when di is positive or negative? also i have an example: A convex lens has a focal length of 60 cm. A candle is placed 50 cm from the lens. What type of image is formed and how far is the image from the

Science 5
What are the characteristics of globular cluster stars? A.no stars as hot as our Sun B.old age and hundreds of thousands to millions of member stars C.no main sequence stars left, with billions of member stars D.a few hundred stars, most still on the main

Physics  optics
A converging lens (f1 = 24.0 cm) is located 56.0 cm to the left of a diverging lens (f2 = 28.0 cm). An object is placed to the left of the converging lens, and the final image produced by the twolens combination lies 20.1 cm to the left of the diverging

Physics
An object is placed in front of a converging lens in such a position that the lens (f = 14.0 cm) creates a real image located 27.0 cm from the lens. Then, with the object remaining in place, the lens is replaced with another converging lens (f = 18.0 cm).

physics
The focal length of lens is 5.0cm. How far from the lens must the opbject be placed to produce an image 1.5cm from the lens

PHYSICS PLEASE HELP ASAP
When an object is placed 55.0cm from a certain converging lens, it forms a real image. When the object is moved to 45.0cm from the lens, the image moves 6.00 cm farther from the lens. Find the focal length of this lens? Please someone help me out I tried

Science
A concave lens has a focal length 10cm.An object of height 2.5cm is kept at a distance of30cm from the lens .Determine the position of image & its size

physics
An apple is placed 17.0 cm in front of a diverging lens with a focal length of magnitude 23.2 cm. What is the image distance i of the image of the apple through this lens? What is the magnification of the image of the apple? Wwhich of the following

Mathematics
The points scored in a basketball game by the individual players of two teams, High Rangers and Rising Stars, is recorded during the game. After the game, the manager found that the range for the High Rangers is 20 points and the range for the Rising Stars

Physics
An object is placed in front of a converging lens in such a position that the lens (f = 13.2 cm) produces a real image located 23.5 cm from the lens. Then, with the object remaining in place, the lens is replaced with another converging lens (f = 18.8 cm).

Physics
A lighted candle is placed 38 cm in front of a diverging lens. The light passes through the diverging lens and on to a converging lens of focal length 10 cm that is 5 cm from the diverging lens. The final image is real, inverted, and 19 cm beyond the

Physics
An object, that is 3.25 mm high is placed 16 cm in front of a lens. The image produced by this lens appears 6.0 cm behind the object, as the figure shows. (a) What is the focal length of this lens and what type of lens is it? (b) What is the height of the

Physics
An object 20cm high is placed 40cm from a lens of focal length 24cm. Calculate: a) The power of the Lens? b) The distance from the lens to the position of the image?

Calculus! Please help me!
A person on a bicycle is 100 meters west of a person in a car. the person on the bike starts to ride at 8 meters per second directly east and at the same time the person in the car starts to drive directly north at 18 meters per second. Write the distance

Physics
Hi guys, I'm a little stuck on this question I'm doing at the moment. If anyone has spare time, I'd be extremely grateful! A lens with 50cm focal length produces a real image the same size as the object. a)How far from the lens is the object? b)How far

physics
An object whose height is 0.670 meters is located 2.00 meters from the face of a thin convex lens with a focal length of 0.780 meters. The image will be located ______ meters away from the lens.

Physics
A double lens system is made of +35.0 cm lens (lens #1) and a  26.0 cm lens (lens #2). Lens #1 is placed at x = 0 cm on a meter stick and lens #2 is placed at x = 30.0 cm. Where on the meter stick will the final image be formed when looking at a distant

Physics
An object is placed to the left of a lens, and a real image is formed to the right of the lens. The image is inverted relative to the object and is onehalf the size of the object. The distance between the object and the image is 65 cm. (a) How far from

Physics
Determine the resolving power of a telescope,if the objective of a telescope has a diameter of 300mm.The mean wavelength of the light from Stars is 6*10^7m.

physics
A biconcave lens made from glass with n=1.5. The radii of curvatures are 20cm and 10cm, and thickness is 5cm. An object of height 2cm is placed 8cm to the left of surface of the lens. a) Describe the final image; location, nature (real/virtual), size,

Physics
A converging lens forms a virtual image 2.61 times the size of the objecT. The object distance is 11cm. Find the distance of the focal point from the center of the lens.

College Physics
A convergent lens forms a real image 2.41 times the size of the object. The distancebetween object and image is 62.6 cm.Find the distance of the focal point fromthe center of the lens.Answer in units of cm

Physics
An object is 14 cm in front of a diverging lens that has a focal length of 7.9 cm. How far in front of the lens should the object be placed so that the size of its image is reduced by a factor of 1.9?

Physics
A spy satellite orbiting at 160 km above Earth's surface has a lens with a focal length of 3.6 m and can resolve objects on the ground as small as 30 cm. For example, it can easily measure the size of an aircraft's air intake port. What is the effective

Physics repost please clarify
A converging lens has a focal length of 0.060 m. An object is located 0.020 m to the left of this lens. A second converging lens has the same focal length as the first one and is located 0.100 m to the right of it. Relative to the second lens, where is the

physics
Because a concave lens cannot form a real image of a real object, it is difficult to measure its focal length precisely. One method uses a second, convex, lens to produce a virtual object for the concave lens. Under the proper conditions, the concave lens

college physics
A 4.5 cm long insect is perpendicular to the optical axis of a thin lens; the bug is 5.4 cm away from the lens. The lens forms an inverted image of the insect which is 0.9 cm long on a screen behind the lens. a. How far behind the lens is the screen? b.

physics
A box is placed 50 cm away from a double convex lens. The image is on the opposite side of the lens, is inverted and 50 cm away from the lens. find: a)the focal length of the lens. b)the height of the image. c) using the focal length that you found, how

Science Important
1. A toy of height 18.4 cm is balanced in front of a converging lens. An inverted, real image of height 33 cm is noticed on the other side of the lens. What is the magnification of the lens? 2. A convex lens or a magnifying glass is held 2.00 cm above a

Physics
A camera with a telephoto lens of focal length 125mm takes a picture of a 1.8m tall woman standing 5.0m away. (1). What must be the distance between the film and the lens to get a properly focused picture? (2). What is the magnification of the image (3).

Physics
A camera with a telephoto lens of focal length 125mm takes a picture of a 1.8m tall woman standing 5.0m away. (1). What must be the distance between the film and the lens to get a properly focused picture? (2). What is the magnification of the image (3).

Physics
A camera with a telephoto lens of focal length 125mm takes a picture of a 1.8m tall woman standing 5.0m away. (1). What must be the distance between the film and the lens to get a properly focused picture? (2). What is the magnification of the image (3).

Stats
A simple random sample will be obtained from a normally distributed population. Find the minimum sample size needed to be 99% confident that the sample standard deviation s is within 5% of the standard deviation. Is such a sample size practical in most

phys
What is the minimum lens size (in meters) that will permit just resolving 2 stars 1.1 second apart using light of 510nm?

physics
Two stars are 2.4 × 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.72 m and just detects these stars as separate objects. Assume that light of wavelength 590 nm is being observed. Also, assume

physics
Two stars are 3.80 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.19 m and just detects these stars as separate objects. Assume that light of wavelength 550 nm is being observed. Also assume that

physics
Two stars are 4.40 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.03 m and just detects these stars as separate objects. Assume that light of wavelength 550 nm is being observed. Also assume that

physics
A pin 2 cm long is placed 12 cm away from a convex lens at right angles to the principal axis. If the focal length of the lens is 20 cm, by scale drawing and lens formula find the nature , size and position of image.

Physics
A object 0.25mm long is viewed through a converging lens.calculate the distance of the object from the lens,size of the image,power of the lens

PhysLens Question
A double lens system is made of +35.0 cm lens (lens #1) and a  26.0 cm lens (lens #2). Lens #1 is placed at x = 0 cm on a meter stick and lens #2 is placed at x = 30.0 cm. Where on the meter stick will the final image be formed when looking at a distant

Physics Optics
A double lens system is made of +35.0 cm lens (lens #1) and a  26.0 cm lens (lens #2). Lens #1 is placed at x = 0 cm on a meter stick and lens #2 is placed at x = 30.0 cm. Where on the meter stick will the final image be formed when looking at a distant

Physics
an object that is 6 cm in height is put 9 cm from a convex lens. The lens has a focal length of 8 cm. What is the size of the image?

physics
A convex lens is needed to produce an image that is 0.55 times the size of the object and located 30 cm from the lens on the other side. What focal length should be specified?

physics
A convex lens is needed to produce an image that is 0.70 times the size of the object and located 28 cm from the lens on the other side. What focal length should be specified?

Physics
What is the focal length if a lens that has a center of curvature 8 meters from one of the curves on the lens?

Physics
What is the focal length of a lens that has a center of curvature of 18 meters from one of the curves of the lens?

physics
A 24mm high object is 15cm in front of a +10cm concave lens . 24cm behind the convex lens is a 10cm concave lens . Calculate the size of the final object.

physics
A 24mm high object is 15cm in front of a +10cm concave lens . 24cm behind the convex lens is a 10cm concave lens . Calculate the size of the final object.

Physics
A simple camera telephoto lens consists of two lenses. The objective lens has a focal length f1 = +41.7 cm. Precisely 36.1 cm behind this lens is a concave lens with a focal length f2 = 13.9 cm. The object to be photographed is 4.06 m in front of the

Physics ( optics)
A simple camera telephoto lens consists of two lenses. The objective lens has a focal length f1 = +41.7 cm. Precisely 36.1 cm behind this lens is a concave lens with a focal length f2 = 13.9 cm. The object to be photographed is 4.06 m in front of the

Physics
what is the minimum thickness of magnetization fluoride coating on a lens which will make the lens non reflecting for light of wavelength 5000 Angstrom. Take the refractive index of magnesium fluoride as 1.83

Science
an object of size 3 cm is place 10 cm away from the convex lens find the position nature and size of the images it focal length is 7 cm.

physics
An object of size 3cm is placed 14cm in front of a concave lens of focal length 21cm calculate position and size of the image?

physics
From a distance of 60 m, a photographer uses a telephoto lens (f = 300.0 mm) to take a picture of a charging rhinoceros. How far from the rhinoceros would the photographer have to be to record an image of the same size using a lens whose focal length is

Ecology
Menge and colleagues performed experiments in which they exposed some populations of mussels to sea stars and excluded sea stars from other mussel populations. Suppose that the sea star population consists of 20 individuals and the two populations of

Biology
Menge and colleagues performed experiments in which they exposed some populations of mussels to sea stars and excluded sea stars from other mussel populations. Suppose that the sea star population consists of 20 individuals and the two populations of

physics
A 10meter object is placed at a distance of 165 meters in front of a lens whose focal length is 50 meters. Which of the following describes the image formed?

Physics 2
A converging lens with a focal length of 19 cm is used to form an image on a screen that is 3.3 m to the right the lens. Where must the object be placed? ____m to the left of the lens?

Physics
An object is 3 cm tall is placed 24 cm from a converging lens.a real image is formed 8 cm from the lens.the focal length of the lens is

science
A concave lens or focal lens 10cm produce an erect image 40cm from the lens .Determine the object distance and magnification.

Physics
A converging lens (f1 = 24.0 cm) is located 56.0 cm to the left of a diverging lens (f2 = 28.0 cm). An object is placed to the left of the converging lens, and the final image produced by the twolens combination lies 19.7 cm to the left of the diverging

lenses, still stuck!
I need to calculate the magnification, m of an objective lens, so I can then x it by the eyepiece value for M to get the total magnification. I need v/u (v is dist from lens to image; u is dist of object to lens) I'm using 1/f = 1/v+1/u rearranged for 1/v.

physics, lenses
I need to calculate the magnification, m of an objective lens, so I can then x it by the eyepiece value for M to get the total magnification. I need v/u (v is dist from lens to image; u is dist of object to lens) I'm using 1/f = 1/v+1/u rearranged for 1/v.