Question 1

Which of the following best describes the relationship between wavelength and frequency for electromagnetic waves?

Accepted Answer

Wavelength and frequency are inversely proportional.

Question 2

If the speed of light in a vacuum is $$3.00 	imes 10^8$ m/s, what is the frequency of light with a wavelength of 600$ nm?

Accepted Answer

$$5.00 	imes 10$$^{14}$$ Hz

Question 3

Which part of an electromagnetic wave is defined as the highest point above the rest position?

Accepted Answer

Crest

Question 4

A student observes two electromagnetic waves: Wave A has a wavelength of $$400 nm $$and Wave B has a wavelength of $$700 nm. $$Which wave has the higher frequency?

Accepted Answer

Wave A

Question 5

Which equation correctly relates the speed of light $$(c)$$, wavelength $$(\lambda)$$, and frequency $$(
u)$$?

Accepted Answer

$$c = \lambda 
u$$

Question 6

If the frequency of a wave is doubled, what happens to its wavelength (assuming the speed of light remains constant)?

Accepted Answer

The wavelength is halved.

Question 7

Which of the following electromagnetic waves has the highest energy?

Accepted Answer

A wave with a short wavelength and high frequency

Question 8

A scientist measures the frequency of a wave as $$6.0 	imes 10$$^{14}$$ Hz. What is the wavelength of this wave in meters? (Use c = 3.00$$ 	imes $$10^8 m/s)$$

Accepted Answer

$$5.0 	imes 10$$^{-7}$$ m

Question 9

Which of the following best explains why ultraviolet light is more dangerous to humans than visible light?

Accepted Answer

Ultraviolet light has a higher frequency and therefore more energy.

Question 10

In a hospital, a technician uses a laser with a wavelength of $$532 nm $$for eye surgery. What is the frequency of this laser light? (Use $$c = 3.00 	imes 10^8$ m/s)

Accepted Answer

$$5.64 	imes 10$$^{14}$$ Hz

Question 11

Which of the following statements about electromagnetic waves is FALSE?

Accepted Answer

Their frequency is directly proportional to their wavelength.

Question 12

A radio station broadcasts at a frequency of $$100$$ MHz. What is the wavelength of the radio waves? (Use $$c = 3.00 	imes 10^8$ m/s)

Accepted Answer

$$3.00 m$$

Question 13

Which of the following best describes the term 'amplitude' in the context of a wave?

Accepted Answer

The maximum distance from the rest position to the crest or trough

Question 14

If a wave has a frequency of $$2.0 	imes 10$$^{15}$$ Hz and a wavelength of 1.5$$ 	imes $$10^{-7} m$$, what is the speed of the wave?

Accepted Answer

$$3.0 	imes 10^8$ m/s

Question 15

Which of the following is a correct unit for frequency?

Accepted Answer

Hz (hertz)

Wavelength and Frequency of Electromagnetic Waves

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