Question 1

What resolving power must a diffraction grating have in order to distinguish wavelengths of 686.30 nm and 687.50 nm? (1 nm = 10−9 m)

Accepted Answer

A) 343 
B) 572 
C) 686.9 
D) 915 
E) ​687.5 
A) 343 
B) 572 
C) 686.9 
D) 915 
E) ​687.5 B

Question 2

Even relatively small astronomical telescopes are ordinarily not used for terrestrial observation because

Accepted Answer

A) their images are too bright. 
B) their images are too dim. 
C) their images are inverted. 
D) their images are not in color. 
A) their images are too bright. 
B) their images are too dim. 
C) their images are inverted. 
D) their images are not in color. C

Question 3

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 B

Question 4

Which term identifies the defect where the lens produces a line image of a point source?

Accepted Answer

A) myopia 
B) presbyopia 
C) hyperopia 
D) astigmatism 
A) myopia 
B) presbyopia 
C) hyperopia 
D) astigmatism

Question 5

​A microscope has a tube length of 15.0 cm,an objective focal length of 0.95 cm,and an eyepiece focal length of 2.50 cm.What is the magnification of the microscope? Assume it is adjusted so that the eye is relaxed.

Accepted Answer

A) ​122 
B) ​132 
C) ​148 
D) ​12 
A) ​122 
B) ​132 
C) ​148 
D) ​12

Question 6

A camera lens is initially set at f/8 for a shutter speed of 1/250 s.If the amount of lighting on the subject is unchanged,and the lens is set at f/4,what is the proper shutter speed at this setting?

Accepted Answer

A) 1/1000 s 
B) 1/500 s 
C) 1/250 s 
D) 1/2 s 
E) 1/8​ s 
A) 1/1000 s 
B) 1/500 s 
C) 1/250 s 
D) 1/2 s 
E) 1/8​ s

Question 7

Which of the following statements is correct?​

Accepted Answer

A) ​For a nearsighted person,the near point is always located closer than 25 cm from the eye and the corrective lens is diverging. 
B) ​For a nearsighted person,the near point is always located closer than infinity from the eye and the corrective lens is converging. 
C) ​For a farsighted person,the near point is always located farther than 1 m from the eye and the corrective lens is diverging. 
D) ​For a farsighted person,the near point is always located farther than 25 cm from the eye and the corrective lens is converging. 
A) ​For a nearsighted person,the near point is always located closer than 25 cm from the eye and the corrective lens is diverging. 
B) ​For a nearsighted person,the near point is always located closer than infinity from the eye and the corrective lens is converging. 
C) ​For a farsighted person,the near point is always located farther than 1 m from the eye and the corrective lens is diverging. 
D) ​For a farsighted person,the near point is always located farther than 25 cm from the eye and the corrective lens is converging.

Question 8

The "normal" eye has a near point of 25 cm.If a given individual's near point is 73 cm,for what problem will the eye doctor prescribe correction?

Accepted Answer

A) myopia 
B) presbyopia 
C) hyperopia 
D) astigmatism 
E) ​color blindness 
A) myopia 
B) presbyopia 
C) hyperopia 
D) astigmatism 
E) ​color blindness

Question 9

​A simple magnifier has a focal length of 5.9 cm.What is the maximum angular magnification of the lens?

Accepted Answer

A) ​5.2 
B) ​4.2 
C) ​3.2 
D) ​3.6 
A) ​5.2 
B) ​4.2 
C) ​3.2 
D) ​3.6

Question 10

If a person has hyperopia that person

Accepted Answer

A) may have an unusually long eyeball. 
B) cannot see near objects clearly. 
C) cannot relax the ciliary muscle adequately. 
D) cannot form images behind the retina. 
A) may have an unusually long eyeball. 
B) cannot see near objects clearly. 
C) cannot relax the ciliary muscle adequately. 
D) cannot form images behind the retina.

Question 11

The Yerkes refracting telescope has a 1-m-diameter objective lens of focal length 20 m and an eyepiece of focal length 3.5 cm.What is the magnification of the planet Mars as seen through this telescope?

Accepted Answer

A) 140 
B) 280 
C) 570 
D) 1,000 
E) ​35 
A) 140 
B) 280 
C) 570 
D) 1,000 
E) ​35

Question 12

A 1.7-m tall woman stands 8.0-m in front of a camera with a 5.0-cm focal length lens.What is the size of the image formed on film?

Accepted Answer

A) 23.5 cm 
B) 2.7 cm 
C) 1.1 cm 
D) 68.0 cm 
E) ​0.37 cm 
A) 23.5 cm 
B) 2.7 cm 
C) 1.1 cm 
D) 68.0 cm 
E) ​0.37 cm

Question 13

If different filters are used with an astronomical telescope,which of the following would give the best resolution?

Accepted Answer

A) red 
B) yellow 
C) green 
D) ​purple 
E) ​All yield the same resolution. 
A) red 
B) yellow 
C) green 
D) ​purple 
E) ​All yield the same resolution.

Question 14

While a camera has film where the image is formed,the eye forms the image on the

Accepted Answer

A) pupil. 
B) cornea. 
C) retina. 
D) optic nerve. 
A) pupil. 
B) cornea. 
C) retina. 
D) optic nerve.

Question 15

How many lines in a grating must be illuminated to obtain a resolving power of 400 in a fourth-order spectrum?

Accepted Answer

A) 1,600 
B) 100 
C) 400 
D) 10 
E) ​40 
A) 1,600 
B) 100 
C) 400 
D) 10 
E) ​40

Question 16

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 17

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

Question 18

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 19

Two thin lenses have powers P1 and P2,measured in diopters.If these lenses are placed in contact with one another,the resulting power is

Accepted Answer

A) more than both P1 and P2. 
B) less than both P1 and P2. 
C) half-way between P1 and P2. 
D) P1 + P2. 
A) more than both P1 and P2. 
B) less than both P1 and P2. 
C) half-way between P1 and P2. 
D) P1 + P2.

Question 20

A fringe shift occurs for every ________ wavelength movement of the adjustable mirror in a Michelson interferometer.

Accepted Answer

A) whole 
B) half 
C) quarter 
D) eighth 
A) whole 
B) half 
C) quarter 
D) eighth

Exam 25: Optical Instruments

What resolving power must a diffraction grating have in order to distinguish wavelengths of 686.30 nm and 687.50 nm? (1 nm = 10−9 m)

Even relatively small astronomical telescopes are ordinarily not used for terrestrial observation because

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

Which term identifies the defect where the lens produces a line image of a point source?

​A microscope has a tube length of 15.0 cm,an objective focal length of 0.95 cm,and an eyepiece focal length of 2.50 cm.What is the magnification of the microscope? Assume it is adjusted so that the eye is relaxed.

A camera lens is initially set at f/8 for a shutter speed of 1/250 s.If the amount of lighting on the subject is unchanged,and the lens is set at f/4,what is the proper shutter speed at this setting?

Which of the following statements is correct?​

The "normal" eye has a near point of 25 cm.If a given individual's near point is 73 cm,for what problem will the eye doctor prescribe correction?

​A simple magnifier has a focal length of 5.9 cm.What is the maximum angular magnification of the lens?

If a person has hyperopia that person

The Yerkes refracting telescope has a 1-m-diameter objective lens of focal length 20 m and an eyepiece of focal length 3.5 cm.What is the magnification of the planet Mars as seen through this telescope?

A 1.7-m tall woman stands 8.0-m in front of a camera with a 5.0-cm focal length lens.What is the size of the image formed on film?

If different filters are used with an astronomical telescope,which of the following would give the best resolution?

While a camera has film where the image is formed,the eye forms the image on the

How many lines in a grating must be illuminated to obtain a resolving power of 400 in a fourth-order spectrum?

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.

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

Two thin lenses have powers P1 and P2,measured in diopters.If these lenses are placed in contact with one another,the resulting power is

A fringe shift occurs for every ________ wavelength movement of the adjustable mirror in a Michelson interferometer.

Units, Trigonometry, and Vectors

Motion in One Dimension

Motion in Two Dimensions

Newtons Laws of Motion

Energy

Momentum, Impulse, and Collisions

Rotational Motion and Gravitation

Rotational Equilibrium and Dynamics

Fluids and Solids

Thermal Physics

Energy in Thermal Processes

The Laws of Thermodynamics

Vibrations and Waves

Sound

Electric Forces and Fields

Electrical Energy and Capacitance

Current and Resistance

Direct-Current Circuits

Magnetism

Induced Voltages and Inductance

Alternating-Current Circuits and Electromagnetic Waves

Reflection and Refraction of Light

Mirrors and Lenses

Wave Optics

Relativity

Quantum Physics

Atomic Physics

Nuclear Physics

Nuclear Energy and Elementary Particles

Filters

What resolving power must a diffraction grating have in order to distinguish wavelengths of 686.30 nm and 687.50 nm? (1 nm = 10−⁹ m)

A microscope has a tube length of 15.0 cm,an objective focal length of 0.95 cm,and an eyepiece focal length of 2.50 cm.What is the magnification of the microscope? Assume it is adjusted so that the eye is relaxed.

Which of the following statements is correct?

A simple magnifier has a focal length of 5.9 cm.What is the maximum angular magnification of the lens?

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

Two thin lenses have powers P₁ and P₂,measured in diopters.If these lenses are placed in contact with one another,the resulting power is