Question

AM waves have a wavelength of approximately 100 meters. FM waves have a wavelength of approximately 1 meter. Which one has a higher frequency? Which one has higher energy?(1 point)
Responses

FM has a higher frequency and higher energy.
FM has a higher frequency and higher energy.

AM has a higher frequency and higher energy.
AM has a higher frequency and higher energy.

FM has a higher frequency, but AM is higher energy.
FM has a higher frequency, but AM is higher energy.

AM has a higher frequency, but FM is higher energy.

Answer 1

Why would a person feel cooler wearing a white shirt rather than a black shirt on a sunny day?(1 point)
Responses

Light would be mostly transmitted rather than absorbed or reflected.
Light would be mostly transmitted rather than absorbed or reflected.

Light would be mostly reflected rather than absorbed or transmitted.
Light would be mostly reflected rather than absorbed or transmitted.

Light would be mostly absorbed or reflected rather than transmitted.
Light would be mostly absorbed or reflected rather than transmitted.

Light would be mostly absorbed or transmitted rather than reflected.

Answer 2

The formula vw=f⋅λ describes the relationship between the speed of a wave ( vw ), and its frequency ( f ) and wavelength ( λ ).

For example, if a wave has a frequency of 120 Hz and a wavelength of 5m, it would have a speed of 600 m/s.

In one or two sentences, describe what would happen to the frequency of this wave if the wavelength is increased to 10m but the speed stays the same at 600 m/s.

(2 points)

Answer 3

Red tape can be used to repair a broken taillight on a car. In one or two sentences, explain how different colors of light are transmitted, reflected, and absorbed by this kind of tape.(2 points)

Answer 4

You want to make a photo album for your friend. In three to five sentences, describe at least one advantage and one disadvantage of choosing a digital photo album rather than a physical one. Analyze a potential solution to the disadvantage.(4 points)