Galileo said that if you rolled a ball along a level surface it would
A) slow down due to its natural tendency to come to rest.
B) keep rolling without slowing down if no friction acted upon it.
C) roll as long as its inertia nudged it along.
D) eventually roll in the opposite direction.
Answer: B
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When the adjustable mirror on the Michelson interferometer is moved 20 wavelengths, how many fringe pattern shifts would be counted?
A. 5 B. 10 C. 20 D. 40 E. 80
When the reflection of an object is seen in a convex mirror the image will
a. always be real. b. always be virtual. c. may be either real or virtual. d. will always be enlarged.
A photon has energy of 4.20 eV. To what wavelength does this energy correspond?
A) 321 nm B) 103 nm C) 296 nm D) 412 nm E) 420 nm
If the Earth rotated much more slowly, which of the following would be a consequence of that?
A) Seasons would be more extreme. B) Days would get hotter and nights would get colder. C) Days would be shorter. D) Seasons would last longer.