Question

How has Electromagnetic Spectrum impacted society?

Answer 1

It has enabled us to tap different frequencies for the benefit of mankind.

Explanation:

Infra-red is used for heating.
UV light is used to initialize EPROM's (a kind of computer memory),
Gamma knife is used in nuclear medicine.
Visible light impacts what we see.
Microwaves are used in the kitchen.
Radio waves were once used for radio.