A) moving the lens. B) moving the retina. C) moving both the lens and the retina. D) changing the focal length of the lens. E) changing the index of refraction of the vitreous fluid. A) moving the lens. B) moving the retina. C) moving both the lens and the retina. D) changing the focal length of the lens. E) changing the index of refraction of the vitreous fluid.

Two converging lenses,the first with focal length 40 cm and the second with focal length 331/3 cm,are separated by 10.0 cm.An object of height 6.0 cm is placed 20.0 cm in front of the first lens.Where is the final image formed?

A) 10 cm before the first lens B) 50 cm before the first lens C) 50 cm after the second lens D) 100 cm after the second lens E) 331/3 cm after the second lens A) 10 cm before the first lens B) 50 cm before the first lens C) 50 cm after the second lens D) 100 cm after the second lens E) 331/3 cm after the second lens

Exam 24: Optical Instruments

A telescope is set up in introductory physics lab using a 10 cm lens and a 50 cm lens.Since both lenses are the same diameter it is not evident which one to use as the eyepiece and which one to use as the objective.If one uses the 50 cm lens as the eyepiece,what power results?

(Multiple Choice)

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Question 41

An astronomical telescope has a magnifying power of 200 $\times$ when operated with a 3.50 cm eyepiece.What is the focal length of the objective of this telescope?

(Multiple Choice)

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Question 42

Two converging lenses,the first with focal length 10.0 cm and the second with focal length 20.0 cm,are separated by 40.0 cm.An object,3.00 cm in height,is placed 30.0 cm in front of the first lens.What is the height of the final image?

(Multiple Choice)

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Question 43

A 10 D lens is placed in contact with a 15 D lens.What is the refractive power of the combination?

(Multiple Choice)

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Question 44

The loss of accommodation that comes with aging is called

(Multiple Choice)

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Question 45

What causes chromatic aberration?

(Multiple Choice)

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Question 46

Reflecting telescopes may suffer with what kind of aberration(s)?

(Multiple Choice)

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Question 47

Two converging lenses,the first with focal length 25 cm and the second with focal length 20 cm,are separated by 30 cm.A 4.0 cm tall object is placed 50 cm in front of the first lens.Which of the following characteristics does the final image have?

(Multiple Choice)

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Question 48

Two lenses,the first with focal length 10.0 cm and the second with focal length -12.5 cm,are separated by 20.0 cm.An object,2.40 cm tall,is 15.0 cm in front of the first lens.Which of the following characteristics does the final image have?

(Multiple Choice)

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Question 49

A nearsighted person has a far point of 33 cm.What focal length contact lens would allow her to see in the distance?

(Multiple Choice)

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Question 50

Two lenses,the first with focal length -12.5 cm and the second with focal length 20.0 cm,are separated by 15.0 cm.If an object is place 50.0 cm in front of the first lens,where is the final image formed?

(Multiple Choice)

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Question 51

A farsighted person cannot see clearly closer than 2.0 m.What power contact lenses would correct this near point to 25 cm?

(Multiple Choice)

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Question 52

Two converging lenses,the first with focal length 40 cm and the second with focal length 33¹/₃ cm,are separated by 10.0 cm.An object of height 6.0 cm is placed 20.0 cm in front of the first lens.What are the size and orientation of the final image?

(Multiple Choice)

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Question 53

If an object is placed before a singe thin lens

(Multiple Choice)

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Question 54

Two converging lenses,the first with focal length 10.0 cm and the second with focal length 20.0 cm,are separated by 40.0 cm.An object,3.00 cm in height,is placed 30.0 cm in front of the first lens.Where is the image caused by the first lens?

(Multiple Choice)

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Question 55

The eye focuses by

(Multiple Choice)

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Question 56

The objective of an astronomical telescope has a focal length of 900 mm.The telescope has eyepieces of focal lengths 20 mm,15 mm,and 10 mm.What is the highest magnification for this telescope?

(Multiple Choice)

4.9/5

(38)

Question 57

Two converging lenses,the first with focal length 40 cm and the second with focal length 33¹/₃ cm,are separated by 10.0 cm.An object of height 6.0 cm is placed 20.0 cm in front of the first lens.Where is the final image formed?

(Multiple Choice)

4.7/5

(35)

Question 58

A compound microscope gives a magnification of 200 $\times$ with an eyepiece of focal length 2.00 cm.If the eyepiece is replaced with an eyepiece of focal length 1.50 cm,what magnification results?

(Multiple Choice)

4.7/5

(38)

Question 59

Two converging lenses,the first with focal length 10.0 cm and the second with focal length 20.0 cm,are separated by 40.0 cm.An object,3.00 cm in height,is placed 30.0 cm in front of the first lens.Where is the final image formed?

(Multiple Choice)

4.9/5

(29)

Question 60

Showing 41 - 60 of 68

Exam 24: Optical Instruments

A telescope is set up in introductory physics lab using a 10 cm lens and a 50 cm lens.Since both lenses are the same diameter it is not evident which one to use as the eyepiece and which one to use as the objective.If one uses the 50 cm lens as the eyepiece,what power results?

An astronomical telescope has a magnifying power of 200 ×\times× when operated with a 3.50 cm eyepiece.What is the focal length of the objective of this telescope?

Two converging lenses,the first with focal length 10.0 cm and the second with focal length 20.0 cm,are separated by 40.0 cm.An object,3.00 cm in height,is placed 30.0 cm in front of the first lens.What is the height of the final image?

A 10 D lens is placed in contact with a 15 D lens.What is the refractive power of the combination?

The loss of accommodation that comes with aging is called

What causes chromatic aberration?

Reflecting telescopes may suffer with what kind of aberration(s)?

Two converging lenses,the first with focal length 25 cm and the second with focal length 20 cm,are separated by 30 cm.A 4.0 cm tall object is placed 50 cm in front of the first lens.Which of the following characteristics does the final image have?

Two lenses,the first with focal length 10.0 cm and the second with focal length -12.5 cm,are separated by 20.0 cm.An object,2.40 cm tall,is 15.0 cm in front of the first lens.Which of the following characteristics does the final image have?

A nearsighted person has a far point of 33 cm.What focal length contact lens would allow her to see in the distance?

Two lenses,the first with focal length -12.5 cm and the second with focal length 20.0 cm,are separated by 15.0 cm.If an object is place 50.0 cm in front of the first lens,where is the final image formed?

A farsighted person cannot see clearly closer than 2.0 m.What power contact lenses would correct this near point to 25 cm?

Two converging lenses,the first with focal length 40 cm and the second with focal length 331/3 cm,are separated by 10.0 cm.An object of height 6.0 cm is placed 20.0 cm in front of the first lens.What are the size and orientation of the final image?

If an object is placed before a singe thin lens

Two converging lenses,the first with focal length 10.0 cm and the second with focal length 20.0 cm,are separated by 40.0 cm.An object,3.00 cm in height,is placed 30.0 cm in front of the first lens.Where is the image caused by the first lens?

The eye focuses by

The objective of an astronomical telescope has a focal length of 900 mm.The telescope has eyepieces of focal lengths 20 mm,15 mm,and 10 mm.What is the highest magnification for this telescope?

Two converging lenses,the first with focal length 40 cm and the second with focal length 331/3 cm,are separated by 10.0 cm.An object of height 6.0 cm is placed 20.0 cm in front of the first lens.Where is the final image formed?

A compound microscope gives a magnification of 200 ×\times× with an eyepiece of focal length 2.00 cm.If the eyepiece is replaced with an eyepiece of focal length 1.50 cm,what magnification results?

Two converging lenses,the first with focal length 10.0 cm and the second with focal length 20.0 cm,are separated by 40.0 cm.An object,3.00 cm in height,is placed 30.0 cm in front of the first lens.Where is the final image formed?

Introduction

Force

Acceleration and Newtons Second Law of Motion

Motion With Constant Acceleration

Circular Motion

Conservation of Energy

Linear Momentum

Torque and Angular Momentum

Fluids

Elasticity and Oscillations

Waves

Sound

Temperature and the Ideal Gas

Heat

Thermodynamics

Electric Forces and Fields

Electric Potential

Electric Current and Circuits

Magnetic Forces and Fields

Electromagnetic Induction

Alternating Current

Electromagnetic Waves

Reflection and Refraction of Light

Interference and Diffraction

Relativity

Early Quantum Physics and the Photon

Quantum Physics

Nuclear Physics

Particle Physics

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An astronomical telescope has a magnifying power of 200 $\times$ when operated with a 3.50 cm eyepiece.What is the focal length of the objective of this telescope?

Two converging lenses,the first with focal length 40 cm and the second with focal length 33¹/₃ cm,are separated by 10.0 cm.An object of height 6.0 cm is placed 20.0 cm in front of the first lens.What are the size and orientation of the final image?

Two converging lenses,the first with focal length 40 cm and the second with focal length 33¹/₃ cm,are separated by 10.0 cm.An object of height 6.0 cm is placed 20.0 cm in front of the first lens.Where is the final image formed?

A compound microscope gives a magnification of 200 $\times$ with an eyepiece of focal length 2.00 cm.If the eyepiece is replaced with an eyepiece of focal length 1.50 cm,what magnification results?