## Physics: Principles with Applications (7th Edition)

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.