How can non visible radiation be used

Here are some popular applications of

non-visible electromagnetic radiation:

- - listen to the weather and music on the radio

- - watch a football game on TV

- - change the TV channel from the couch, using the 'remote'

- - make toast

- - warm leftover meatloaf in the "microwave"

- - make a call with your cellphone

- - text a friend with your 'smartphone'

- - surf the internet in your house without wires (with WiFi in the house)

- - use GPS in the car

- - get a new set of dental X-rays made

- - spend 30 minutes in a tanning bed

- - look at your friend's face

1. Radio

2. Microwave

3. X-ray

4. Alpha rays