1. Electromagnetic Radiation
Light energy
Electromagnetic Radiation

2. Light Energy Like sound:
Light travels in waves that have certain wavelengths and frequencies
Its speed is different in different materials
It can be reflected or absorbed, or it can pass through an object

3. Light Energy Unlike Sound: Light is not a vibration
Light can travel through a vacuum
Light travels more slowly through water and air
Light is a form of electromagnetic radiation

4. Electromagnetic Radiation
Light is a combination of electrical and magnetic energy
Visible light is only a small part of the electromagnetic spectrum

5. How does Light Move? In our experience Light moves in straight lines
It can REFLECT (bounce)
off an object
It can REFRACT (bend) when it moves through an object
PRISM
water

6. Light Absorption Colored materials and filters can absorb light
Some colors absorb more light than others
When light is absorbed the energy is changed into thermal energy