Light Review

Scientists know that electromagnetic radiation travels as an electromagnetic ___.

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Scientists have evidence that electromagnetic radiation behaves like a stream of _____.

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English physicist Thomas Young showed evidence that light behaves like a wave with his double slit experiment. It showed alternating light and dark bands, indicating constructive and destructive interference. (a)  

• true
• false

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The emission of electrons from a metal when light strikes the metal is called

• constructive interference

• the photoelectric effect

• destructive interference

• frequency modulation

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In 1905, Albert Einstein proposed that light, and all electromagnetic radiation, consists of packets of energy. These packets of electromagnetic radiation are called _____

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Blue light has a lower frequency than red light. (a)  

• false
• true

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Photons of blue light have more energy than photons of red light. (a)  

• true
• false

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The (a)   of light decreases as photons travel farther from the source.

• intensity
• wavelength
• frequency
• color

(a)   is the rate at which a wave's energy flows through a given unit of area. You can think of it as "brightness".

• intensity
• frequency
• interference
• wavelength

Which has a higher frequency: gamma rays or microwaves? (a)  

• gamma rays
• they are the same
• microwaves

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