Introduction to Waves

Question 1

What is the difference between a mechanical wave and an electromagnetic wave?

Revolt · Accepted Answer

A mechanical wave travels through matter, while an electromagnetic wave travels through empty space.

Question 2

Question 2

Revolt · Accepted Answer

73620

Question 3

Use the drop-down menus to identify the electromagnetic waves. Label A: Label C: Label D: Label G:

Revolt · Accepted Answer

radio waves; Selection 1: radio waves; Selection 2: infrared; Selection 3: visible light; Selection 4: gamma rays

Question 4

Question 4

Revolt · Accepted Answer

infrared

Question 5

Question 5

Revolt · Accepted Answer

visible light

Question 6

Question 6

Revolt · Accepted Answer

gamma rays

Question 7

What are three ways in which people use microwaves?

Revolt · Accepted Answer

Three ways people use microwaves include cooking and heating food in microwave ovens, transmitting signals for cell phones and television, and using radar for weather tracking and navigation.

Question 8

Compared to visible light, the wavelength of X-rays is and the frequency is .

Revolt · Accepted Answer

Selection 1: shorter; Selection 2: higher

Question 9

Which are characteristics of electromagnetic waves? Check all that apply.

Revolt · Accepted Answer

Waves with a higher frequency have a shorter wavelength.; They all move at the same speed.; They can travel through space.

Question 10

What makes thermal imaging cameras useful?

Revolt · Accepted Answer

They can detect differences in temperature.

Introduction to Waves Answers

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