# Chapter 22 - Electromagnetic Waves - Questions: 7

Wavelength of 1000 km: very long radio waves. Wavelength of 1 km: radio waves. Wavelength of 1 m: TV signals and microwaves. Wavelength of 1 cm: microwaves and satellite TV signals. Wavelength of 1 mm: microwaves and infrared waves. Wavelength of $1 \mu m$: infrared waves.

#### Work Step by Step

This is shown in Figure 22-8.

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