Quadrupling the f-number of a camera lens will change the light intensity admitted to the film by what factor?
a. 1/16
b. 1/4
c. 4
d. 16
e. 3
[Ques. 2] Tripling the focal length of a telephoto lens, while holding aperture size constant, will change the light intensity admitted to the film by what factor?
a. 0.11
b. 0.33
c. 3.0
d. 9.0
e. 0.50
[Ques. 3] Tripling the aperture diameter of a camera lens will change the light intensity admitted to the film by what factor?
a. 0.11
b. 0.33
c. 3.0
d. 9.0
e. 12.0
[Ques. 4] Tripling the focal length in a telephoto lens, while keeping the aperture size constant, will change the f-number by what factor?
a. 1/9
b. 1/3
c. 3
d. 9
e. 1/6
[Ques. 5] Doubling the aperture diameter of a camera lens will change the f-number by what factor?
a. 1/4
b. 1/2
c. 2
d. 4
e. 1/3
[Ques. 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?
a. 1/1000 s
b. 1/500 s
c. 1/250 s
d. 1/2 s
e. 1/8 s
[Ques. 7] What is the f-number of a camera lens that has an aperture-opening diameter of 0.30 cm and a focal length of 6.0 cm?
a. 0.30
b. 1.8
c. 20
d. 6.0
e. 0.05
[Ques. 8] In 2015, gravity waves were observed using which device?
a. The Large Hadron Collider
b. The Sudbury Graviton Observatory
c. The Laser Interferometer Gravitational-Wave Observatory
d. The Superconducting Super Collider
[Ques. 9] Which form of relativity applies for observers who are accelerating?
a. Special relativity applies.
b. General relativity applies.
c. Both special relativity and general relativity apply.
d. Neither applies since the observer must be in an inertial frame to use either one.
[Ques. 10] The gravitational field is equivalent to:
a. the inertial mass.
b. an accelerated frame of reference.
c. an event horizon.
d. a clock running slowly.
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