A camera lens that covers the film with a field of view that corresponds approximately to that of normal vision is referred to as a
A)
normal lens.
B)
telephoto lens.
C)
wide-angle lens.
D)
zoom lens.
E)
digital lens.
A
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Which rocket would require more fuel?
A) one going from the Moon to Earth. B) one going from Earth to the Moon. C) both the same.
If you could find a bathtub big enough for Saturn, the planet would
A) explode due to its liquid metallic hydrogen. B) sink due to its metallic interior. C) catch fire, as liquid sodium reacts with water. D) float. E) precipitate more helium.
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a. True b. False Indicate whether the statement is true or false
Fiber optic cable is in the form of a cylinder of fiber with index of refraction 1.67 and cladding around the outside of index of refraction 1.45. What is the maximum angle for light rays inside the fiber with respect to the cable’s axis for which the light will be fully transmitted thanks to total internal reflection?
A. 30o B. 60o C. 41o D. 49o