If we know the wavelength of a light beam, how can we calculate the corresponding frequency?
a. Multiply the wavelength by the speed of light.
b. Multiply the wavelength by the index of refraction.
c. Divide the wavelength by the index of refraction.
d. Divide the wavelength by the speed of light times the index of refraction.
e. Divide the speed of light by the wavelength.
e
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Which is the correct order of planetary object class during their formation?
a. planetesimals, protoplanets, and planets b. planets, planetesimals, and protoplanets c. planetesimals, planets, and planetettes d. protoplanets, planetesimals, and planets e. planetesimals, planetettes, and planets
The Helix and Egg nebulae which originated from (what are today) white dwarf stars are
a. supernova remnants. b. planetary nebulae. c. the result of uranium detonation. d. the result of the collapse of the iron core of each star. e. nebulae associated with protostars.
Which of the following has not been detected around other stars in the Galaxy?
A) a collapsing nebula of gas B) flattened, spinning disks C) jovian planets D) asteroids E) strong stellar winds
Strictly speaking, if any electrical device in an automobile is turned on (such as an air conditioner or even headlights), more fuel is consumed by the engine. This statement is
A) true. B) true only if the engine is running. C) always false. D) sometimes true, sometimes false.