Question 1

A magnifying lens with a focal length of 10 cm has what maximum magnification? (Assume the near point is 25 cm). Do not use the approximation formula.

Accepted Answer

A)  3.5 
B)  2.5 
C)  7.1 
D)  3.0 
A)  3.5 
B)  2.5 
C)  7.1 
D)  3.0

Question 2

What is the f-number of a camera lens that has an aperture-opening diameter of 0.20 cm and a focal length of 3.0 cm?

Accepted Answer

A)  10 
B)  0.10 
C)  15 
D)  0.80 
A)  10 
B)  0.10 
C)  15 
D)  0.80

Question 3

An optical fiber is made with core material of index of refraction 1.30. The fiber is clad with a material of index 1.50. What is the critical angle for this fiber?

Accepted Answer

A)  53.1° 
B)  56.4° 
C)  60.1° 
D)  With these indices, there is not critical angle. 
A)  53.1° 
B)  56.4° 
C)  60.1° 
D)  With these indices, there is not critical angle.

Question 4

Increasing the focal length in a telephoto lens by a factor of nine, while keeping the aperture size constant, will change the f-number by what factor?

Accepted Answer

A)  1/3 
B)  1/9 
C)  9 
D)  3 
A)  1/3 
B)  1/9 
C)  9 
D)  3

Question 5

A magnifier uses a:

Accepted Answer

A)  diverging lens to form a real image. 
B)  diverging lens to form a virtual image. 
C)  converging lens to form a real image. 
D)  converging lens to form a virtual image. 
A)  diverging lens to form a real image. 
B)  diverging lens to form a virtual image. 
C)  converging lens to form a real image. 
D)  converging lens to form a virtual image.

Question 6

Unlike the refracting astronomical telescope discussed in the text that gives an inverted image, Galileo's telescope produced an upright image. What did he do differently to accomplish this?

Accepted Answer

A)  He rotated the barrel of the telescope 180°. 
B)  He used diverging lenses for both the eyepiece and the objective. 
C)  He used a diverging lens for the eyepiece. 
D)  He used a diverging lens for the objective. 
A)  He rotated the barrel of the telescope 180°. 
B)  He used diverging lenses for both the eyepiece and the objective. 
C)  He used a diverging lens for the eyepiece. 
D)  He used a diverging lens for the objective.

Question 7

Doubling the focal length of the objective lens of a compound microscope will change the magnification by what factor?

Accepted Answer

A)  4 
B)  1/4 
C)  2 
D)  1/2 
A)  4 
B)  1/4 
C)  2 
D)  1/2

Question 8

Halving the focal length of a telephoto lens, while holding aperture size constant, will change the light intensity admitted to the film by what factor?

Accepted Answer

A)  0.50 
B)  2.0 
C)  0.25 
D)  4.0 
A)  0.50 
B)  2.0 
C)  0.25 
D)  4.0

Question 9

An optical fiber is made with core material of index of refraction 1.6. The fiber is clad with a material of index 1.2. What is the speed of light traveling along the central axis of this fiber?

Accepted Answer

A)  2.5 *108 m/s 
B)  1.9 * 108 m/s 
C)  2.0 *108 m/s 
D)  3.0 * 108 m/s 
A)  2.5 *108 m/s 
B)  1.9 * 108 m/s 
C)  2.0 *108 m/s 
D)  3.0 * 108 m/s

Question 10

What is the magnitude of the approximate magnification of a compound microscope with objective and eyepiece focal lengths of 0.90 cm and 3.6 cm, respectively, and a separation between lenses of 20 cm?

Accepted Answer

A)  460 
B)  12 
C)  20 
D)  150 
A)  460 
B)  12 
C)  20 
D)  150

Question 11

Which of the following would decrease the magnification of a compound microscope?

Accepted Answer

A)  Replacing the objective lens with one of larger diameter. 
B)  Replacing the eyepiece lens with one of shorter focal length. 
C)  Replacing the eyepiece lens with one of smaller diameter. 
D)  Replacing the objective lens with one of longer focal length. 
A)  Replacing the objective lens with one of larger diameter. 
B)  Replacing the eyepiece lens with one of shorter focal length. 
C)  Replacing the eyepiece lens with one of smaller diameter. 
D)  Replacing the objective lens with one of longer focal length.

Question 12

The eye parts iris, retina, cornea, and ciliary muscle, play roles related to _____, _____, _____, and _____ in a camera.

Accepted Answer

A)  the aperture, the lens, the ccd, focusing 
B)  the lens, focusing, the ccd, the aperture 
C)  the lens, the aperture, focusing, the ccd 
D)  the aperture, the ccd, the lens, focusing 
A)  the aperture, the lens, the ccd, focusing 
B)  the lens, focusing, the ccd, the aperture 
C)  the lens, the aperture, focusing, the ccd 
D)  the aperture, the ccd, the lens, focusing

Question 13

In the NSOM technique, the letter S stands for:

Accepted Answer

A)  slow. 
B)  small. 
C)  scanning. 
D)  swift. 
A)  slow. 
B)  small. 
C)  scanning. 
D)  swift.

Question 14

The pupil of the eye increases in size under which condition?

Accepted Answer

A)  object viewed is well illuminated 
B)  eye is focused on a nearby object 
C)  object viewed is dimly illuminated 
D)  eye is focused on a distant object 
A)  object viewed is well illuminated 
B)  eye is focused on a nearby object 
C)  object viewed is dimly illuminated 
D)  eye is focused on a distant object

Question 15

A lens with a focal length of 12 cm has what refractive power?

Accepted Answer

A)  5.0 diopters 
B)  9.6 diopters 
C)  6.7 diopters 
D)  8.3 diopters 
A)  5.0 diopters 
B)  9.6 diopters 
C)  6.7 diopters 
D)  8.3 diopters

Exam 26: Applications of Optics

A magnifying lens with a focal length of 10 cm has what maximum magnification? (Assume the near point is 25 cm). Do not use the approximation formula.

What is the f-number of a camera lens that has an aperture-opening diameter of 0.20 cm and a focal length of 3.0 cm?

An optical fiber is made with core material of index of refraction 1.30. The fiber is clad with a material of index 1.50. What is the critical angle for this fiber?

Increasing the focal length in a telephoto lens by a factor of nine, while keeping the aperture size constant, will change the f-number by what factor?

A magnifier uses a:

Unlike the refracting astronomical telescope discussed in the text that gives an inverted image, Galileo's telescope produced an upright image. What did he do differently to accomplish this?

Doubling the focal length of the objective lens of a compound microscope will change the magnification by what factor?

Halving the focal length of a telephoto lens, while holding aperture size constant, will change the light intensity admitted to the film by what factor?

An optical fiber is made with core material of index of refraction 1.6. The fiber is clad with a material of index 1.2. What is the speed of light traveling along the central axis of this fiber?

What is the magnitude of the approximate magnification of a compound microscope with objective and eyepiece focal lengths of 0.90 cm and 3.6 cm, respectively, and a separation between lenses of 20 cm?

Which of the following would decrease the magnification of a compound microscope?

The eye parts iris, retina, cornea, and ciliary muscle, play roles related to _____, _____, _____, and _____ in a camera.

In the NSOM technique, the letter S stands for:

The pupil of the eye increases in size under which condition?

A lens with a focal length of 12 cm has what refractive power?

Introduction

Motion, Forces, and Newtons Laws

Forces and Motion in One Dimension

Forces and Motion in Two and Three Dimensions

Circular Motion and Gravitation

Work and Energy

Momentum, Impulse, and Collisions

Rotational Motion

Energy and Momentum of Rotational Motion

Fluids

Harmonic Motion and Elasticity

Waves

Sound

Temperature and Heat

Gases and Kinetic Theory

Thermodynamics

Electric Forces and Fields

Electric Potential

Electric Currents and Circuits

Magnetic Fields and Forces

Magnetic Induction

Alternating-Current Circuits and Machines

Electromagnetic Waves

Geometrical Optics

Wave Optics

Relativity

Quantum Theory

Atomic Theory

Nuclear Physics

Physics in the 21st Century

Filters

The eye parts iris, retina, cornea, and ciliary muscle, play roles related to ___, _, _, and ___ in a camera.