The luminosity of a star allows astronomers to determine the radius and distance of the star.
Answer the following statement true (T) or false (F)
True
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What are the latitudes of the tropics of Cancer and Capricorn?
A) 66.5°N and 66.5°S B) 23.5°N and 23.5°S C) 45.0°N and 45.0°S D) 32.5°N and 32.5°S
You could determine the index of refraction for visible light of a dark but reflective medium such as black glass by measuring the
a. angles of incidence and refraction. b. angle of reflection for an arbitrary angle of incidence. c. angle at which reflected light is completely polarized. d. smallest angle at which X-ray diffraction occurs in the glass. e. smallest angle at which diffraction occurs for visible light when a diffraction pattern is scratched onto the surface.
The temperature in the sun
A. is always hotter than in the shade B. is always the same as in the shade C. is sometimes cooler than in the shade D. is not well defined
The fundamental force that has the shortest range is
A. strong force. B. weak force. C. electromagnetic force. D. gravitational force.