Question 1

Tripling the aperture diameter of a camera lens will change the light intensity admitted to the film by what factor?

Accepted Answer

A)  0.11 
B)  0.33 
C)  3.0 
D)  9.0 
E)  ​12.0 
A)  0.11 
B)  0.33 
C)  3.0 
D)  9.0 
E)  ​12.0

Question 2

A binary star system in the constellation Orion has an angular separation between the stars of 4*10−5 radians.Assuming a wavelength of 500 nm,what is the smallest aperture (diameter)telescope that will just resolve the two stars? (1 nm = 10−9 m)

Accepted Answer

A)  1.2 cm 
B)  1.5 mm 
C)  1.5 cm 
D)  4.8 cm 
E)  ​20 mm 
A)  1.2 cm 
B)  1.5 mm 
C)  1.5 cm 
D)  4.8 cm 
E)  ​20 mm

Question 3

A person with limited accommodation is prescribed lenses of power -3.0 diopters for distant vision.Bifocal inserts are added to these lenses to allow vision at 50 cm.What is the power of the inserts?

Accepted Answer

A)  -1.0 diopters 
B)  2.0 diopters 
C)  5.0 diopters 
D)  50​ diopters 
E)  ​This does not work with negative diopter distance lenses. 
A)  -1.0 diopters 
B)  2.0 diopters 
C)  5.0 diopters 
D)  50​ diopters 
E)  ​This does not work with negative diopter distance lenses.

Question 4

A person can see well in the distance,but cannot do so at an arm's-length distance.To correct this,lenses that are ________ having a ________ power could be used.

Accepted Answer

A)  thicker at their center than at the edges,positive 
B)  thicker at their center than at the edges,negative 
C)  thinner at their center than at the edges,positive 
D)  thinner at their center than at the edges,negative 
A)  thicker at their center than at the edges,positive 
B)  thicker at their center than at the edges,negative 
C)  thinner at their center than at the edges,positive 
D)  thinner at their center than at the edges,negative

Question 5

Changing the f-number of a camera by three stops by going from f/11 to f/32 will change the intensity of the light hitting the film by a factor of:

Accepted Answer

A)  8. 
B)  4. 
C)  1/4. 
D)  1/8. 
E)  ​32. 
A)  8. 
B)  4. 
C)  1/4. 
D)  1/8. 
E)  ​32.

Question 6

A magnifying lens with a focal length of 30 cm has what magnification when the viewing eye is relaxed?

Accepted Answer

A)  7.14 
B)  0.8 
C)  1.3 
D)  1.8 
E)  ​-0.2 
A)  7.14 
B)  0.8 
C)  1.3 
D)  1.8 
E)  ​-0.2

Question 7

If a person is farsighted the corrective lens will:

Accepted Answer

A)  take an object at the near point and form an image at 25 cm. 
B)  take an object at 25 cm and form an image at the near point. 
C)  take an object at infinity and form an image at 25 cm. 
D)  take an object at infinity and form an image at the near point. 
A)  take an object at the near point and form an image at 25 cm. 
B)  take an object at 25 cm and form an image at the near point. 
C)  take an object at infinity and form an image at 25 cm. 
D)  take an object at infinity and form an image at the near point.

Question 8

A farsighted person with astigmatism would be prescribed a lens that is:

Accepted Answer

A)  diverging only. 
B)  both converging and cylindrical.. 
C)  diverging only.. 
D)  both converging and cylindrical. 
A)  diverging only. 
B)  both converging and cylindrical.. 
C)  diverging only.. 
D)  both converging and cylindrical.

Question 9

In the normal eye the ciliary muscles that control the lens will relax:

Accepted Answer

A)  when viewing objects at the near point. 
B)  when viewing objects at infinity. 
C)  when viewing objects at a distance of 20 ft. 
D)  only when a person has his/her eyes closed. 
A)  when viewing objects at the near point. 
B)  when viewing objects at infinity. 
C)  when viewing objects at a distance of 20 ft. 
D)  only when a person has his/her eyes closed.

Question 10

A compound microscope has an eyepiece that:

Accepted Answer

A)  uses a real image from the objective as the object and forms its own real image. 
B)  uses a real image from the objective as the object and forms a virtual image. 
C)  uses a virtual image from the objective as the object and forms its own real image. 
D)  uses a virtual image from the objective as the object and forms its own virtual image. 
A)  uses a real image from the objective as the object and forms its own real image. 
B)  uses a real image from the objective as the object and forms a virtual image. 
C)  uses a virtual image from the objective as the object and forms its own real image. 
D)  uses a virtual image from the objective as the object and forms its own virtual image.

Question 11

Two thin lenses in combination are placed in contact with each other along a common axis.They have powers of 70 and -20 diopters,respectively.What is their combined power?

Accepted Answer

A)  25 diopters 
B)  50 diopters 
C)  90 diopters 
D)  -25 diopters 
E)  ​70 diopters 
A)  25 diopters 
B)  50 diopters 
C)  90 diopters 
D)  -25 diopters 
E)  ​70 diopters

Question 12

Which of the following primarily determines the resolution of a telescope?

Accepted Answer

A)  the barrel length 
B)  the focal length of the objective 
C)  the diameter of the objective 
D)  the diameter of the eyepiece 
A)  the barrel length 
B)  the focal length of the objective 
C)  the diameter of the objective 
D)  the diameter of the eyepiece

Question 13

The pupil of a cat's eye narrows to a slit of width 0.5 mm in daylight.Assuming a wavelength of 500 nm,what is the angular resolution? (1 nm = 10−9 m)

Accepted Answer

A)  1 × 10−3 rad 
B)  5 × 10−3 rad 
C)  1 × 10−4 rad 
D)  5 × 10−4 rad 
E)  ​2.5 × 10−4 rad 
A)  1 × 10−3 rad 
B)  5 × 10−3 rad 
C)  1 × 10−4 rad 
D)  5 × 10−4 rad 
E)  ​2.5 × 10−4 rad

Question 14

Doubling the aperture diameter of a camera lens will change the f-number by what factor?

Accepted Answer

A)  1/4 
B)  1/2 
C)  2 
D)  4 
E)  1/​3 
A)  1/4 
B)  1/2 
C)  2 
D)  4 
E)  1/​3

Question 15

A lens is used as a magnifier.Which of the following statements is incorrect?

Accepted Answer

A)  The lens is convex. 
B)  The dioptric power of the lens is positive. 
C)  The magnification is greatest when the eye focuses at the near point. 
D)  The focal length of the lens must be negative. 
A)  The lens is convex. 
B)  The dioptric power of the lens is positive. 
C)  The magnification is greatest when the eye focuses at the near point. 
D)  The focal length of the lens must be negative.

Question 16

I take two pictures of my dog Kaycee.I use the same film and level of illumination for both pictures,but I quadruple the f-number for the second picture.By what factor will the required time of exposure change if the film is to receive the same total light energy?

Accepted Answer

A)  0.06 
B)  0.25 
C)  4.0 
D)  16.0 
E)  ​3.0 
A)  0.06 
B)  0.25 
C)  4.0 
D)  16.0 
E)  ​3.0

Question 17

Light with a wavelength of 410 nm shines through a lens with an aperture diameter of 0.60 cm.Use Rayleigh's criterion to determine the limiting angle of resolution.(1 nm = 10−9 m)

Accepted Answer

A)  8.3 × 10−5 rad 
B)  2.8 × 10−9 rad 
C)  1.8 × 10−4 rad 
D)  7.9 × 10−7 rad 
E)  ​0.6 × 10−7 rad 
A)  8.3 × 10−5 rad 
B)  2.8 × 10−9 rad 
C)  1.8 × 10−4 rad 
D)  7.9 × 10−7 rad 
E)  ​0.6 × 10−7 rad

Question 18

A given individual is unable to see objects clearly when they are beyond 100 cm.What focal length lens should be used to correct this problem?

Accepted Answer

A)  −100 cm 
B)  −33.3 cm 
C)  −20 cm 
D)  75 cm 
E)  ​100 cm 
A)  −100 cm 
B)  −33.3 cm 
C)  −20 cm 
D)  75 cm 
E)  ​100 cm

Question 19

What is the resolving power of a diffraction grating that is capable of just distinguishing between two wavelengths of 568.20 nm and 569.60 nm? (1 nm = 10−9 m)

Accepted Answer

A)  1.10 
B)  406 
C)  487 
D)  812 
E)  ​568.9 
A)  1.10 
B)  406 
C)  487 
D)  812 
E)  ​568.9

Exam 25: Optical Instruments

Tripling the aperture diameter of a camera lens will change the light intensity admitted to the film by what factor?

A binary star system in the constellation Orion has an angular separation between the stars of 4*10−5 radians.Assuming a wavelength of 500 nm,what is the smallest aperture (diameter)telescope that will just resolve the two stars? (1 nm = 10−9 m)

A person with limited accommodation is prescribed lenses of power -3.0 diopters for distant vision.Bifocal inserts are added to these lenses to allow vision at 50 cm.What is the power of the inserts?

A person can see well in the distance,but cannot do so at an arm's-length distance.To correct this,lenses that are ________ having a ________ power could be used.

Changing the f-number of a camera by three stops by going from f/11 to f/32 will change the intensity of the light hitting the film by a factor of:

A magnifying lens with a focal length of 30 cm has what magnification when the viewing eye is relaxed?

If a person is farsighted the corrective lens will:

A farsighted person with astigmatism would be prescribed a lens that is:

In the normal eye the ciliary muscles that control the lens will relax:

A compound microscope has an eyepiece that:

Two thin lenses in combination are placed in contact with each other along a common axis.They have powers of 70 and -20 diopters,respectively.What is their combined power?

Which of the following primarily determines the resolution of a telescope?

The pupil of a cat's eye narrows to a slit of width 0.5 mm in daylight.Assuming a wavelength of 500 nm,what is the angular resolution? (1 nm = 10−9 m)

Doubling the aperture diameter of a camera lens will change the f-number by what factor?

A lens is used as a magnifier.Which of the following statements is incorrect?

I take two pictures of my dog Kaycee.I use the same film and level of illumination for both pictures,but I quadruple the f-number for the second picture.By what factor will the required time of exposure change if the film is to receive the same total light energy?

Light with a wavelength of 410 nm shines through a lens with an aperture diameter of 0.60 cm.Use Rayleigh's criterion to determine the limiting angle of resolution.(1 nm = 10−9 m)

A given individual is unable to see objects clearly when they are beyond 100 cm.What focal length lens should be used to correct this problem?

What is the resolving power of a diffraction grating that is capable of just distinguishing between two wavelengths of 568.20 nm and 569.60 nm? (1 nm = 10−9 m)

Introduction

Introduction: Part A

Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

Vectors and Two-Dimensional Motion: Part A

The Laws of Motion

The Laws of Motion: Part A

Energy

Energy: Part A

Momentum and Collisions

Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

The Laws of Thermodynamics Work in Thermodynamic Processes

The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

Vibrations and Waves

Vibrations and Waves: Part A

Sound

Sound: Part A

Electric Forces and Electric Fields

Electric Forces and Electric Fields: Part A

Electrical Energy and Capacitance

Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

Magnetism Magnets

Magnetism Magnets: Part A

Induced Voltages and Inductance

Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

Wave Optics: Part A

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Atomic Physics: Part A

Nuclear Physics

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

Particle Collisions, Mediating Photons, and Quark Structures: Exploring the Fundamentals of Physics

A binary star system in the constellation Orion has an angular separation between the stars of 4*10−⁵ radians.Assuming a wavelength of 500 nm,what is the smallest aperture (diameter)telescope that will just resolve the two stars? (1 nm = 10−⁹ m)

A person can see well in the distance,but cannot do so at an arm's-length distance.To correct this,lenses that are having a power could be used.

The pupil of a cat's eye narrows to a slit of width 0.5 mm in daylight.Assuming a wavelength of 500 nm,what is the angular resolution? (1 nm = 10−⁹ m)

Light with a wavelength of 410 nm shines through a lens with an aperture diameter of 0.60 cm.Use Rayleigh's criterion to determine the limiting angle of resolution.(1 nm = 10−⁹ m)

What is the resolving power of a diffraction grating that is capable of just distinguishing between two wavelengths of 568.20 nm and 569.60 nm? (1 nm = 10−⁹ m)