Question 1

If a person is nearsighted the corrective lens will

Accepted Answer

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

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

A camera lens is initially set at f/16 for a shutter speed of 1/30 s.If the amount of lighting on the subject is unchanged,and the lens is set at f/5.6,what is the proper shutter speed at this setting?

Accepted Answer

A)  1/8 s 
B)  1/250 s 
C)  1/500 s 
D)  1/16 s 
A)  1/8 s 
B)  1/250 s 
C)  1/500 s 
D)  1/16 s

Question 4

You are designing contact lenses for someone whose near point is 43 cm.What focal length lens should you prescribe so that an object can be clearly seen when placed at 25 cm in front of the eye?

Accepted Answer

A)  43 cm 
B)  18 cm 
C)  −15 cm 
D)  60 cm 
A)  43 cm 
B)  18 cm 
C)  −15 cm 
D)  60 cm

Question 5

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 6

A high f-number:

Accepted Answer

A)  allows using a slower shutter speed. 
B)  causes more spherical aberration. 
C)  allows a larger depth of focus. 
D)  is not related to any of the above options. 
A)  allows using a slower shutter speed. 
B)  causes more spherical aberration. 
C)  allows a larger depth of focus. 
D)  is not related to any of the above options.

Question 7

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

Accepted Answer

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

Question 8

Doubling the f-number of a camera lens will change the light intensity admitted to the film by what factor?

Accepted Answer

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

Question 9

A camera has a lens that has an adjustable film distance used for focusing purposes.When the object being photographed is at a very large distance,the distance from the lens to the film is 50.0 mm.What would be the lens-to-film distance for an in-focus object 2.00 m from the camera?

Accepted Answer

A)  66.7 mm 
B)  40.0 mm 
C)  51.3 mm 
D)  48.8 mm 
A)  66.7 mm 
B)  40.0 mm 
C)  51.3 mm 
D)  48.8 mm

Exam 26: Relativity: Part A

If a person is nearsighted the corrective lens will

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?

A camera lens is initially set at f/16 for a shutter speed of 1/30 s.If the amount of lighting on the subject is unchanged,and the lens is set at f/5.6,what is the proper shutter speed at this setting?

You are designing contact lenses for someone whose near point is 43 cm.What focal length lens should you prescribe so that an object can be clearly seen when placed at 25 cm in front of the eye?

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?

A high f-number:

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

Doubling the f-number of a camera lens will change the light intensity admitted to the film by what factor?

A camera has a lens that has an adjustable film distance used for focusing purposes.When the object being photographed is at a very large distance,the distance from the lens to the film is 50.0 mm.What would be the lens-to-film distance for an in-focus object 2.00 m from the camera?

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

Optical Instruments: Part A

Relativity

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

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