1. Light Energy Energy given off by electrons.
It travels in waves, and can travel through space.

2. Light is a form of electromagnetic radiation, a combination of electrical and magnetic energy

3. Radio Waves
                                                      
Radio waves can be longer than a football field or as short as a football
Used for TVs, radios, and cell phones to transmit information

4. Microwaves Wavelengths can be measured in centimeters
Microwave ovens use wavelengths close to a foot in length
Good for transmitting information because microwaves can penetrate haze, light rain, cloud and smoke.
Used in radars, like doppler radar for sensing weather forecasts.

5. Infrared Rays
Longer infrared rays have wavelengths about the size of a pinhead; these longer rays are thermal. Experience everyday in the form of heat!
Some animals, like vipers, can see infrared
Shorter rays are about the size of cells. These aren’t hot; used in TV remotes.
People, animals, stars, galaxies all emit infrared

6. Visible Light Only radiant energy we can see
All wavelengths see together make white light
ROY G BIV

7. Ultraviolet Light (UV Rays)
Can’t see with the human eye, but some insects, like bumblebees can see them!
Sun emits light at all wavelengths. But UV rays are responsible for sunburns
Most are blocked from entering by the ozone layer
Scientists use UV rays to detect stars and galaxies

8. X-rays X-rays can travel through skin
But things like bone, metal, or teeth are more dense than skin, and thus absorb the X-rays. X-rays show us a “shadow” of these denser materials.
Many things in space emit X-rays: black holes, stars (like the Sun and others), supernova remnants, comets!

9. Gamma rays
Gamma rays have the smallest wavelengths, and they have the most energy
Generated by radioactive atoms, nuclear explosions, or supernova explosions
Can kill cells
Used to kill cancerous cells or kill bacteria on fruit

10. Gamma Ray Gun (NOTE: This is not real!!!)