lesson 10

Nuclear fusion: when particles join together and fuse

Radiant energy: light

Incandescent light: light hot enough to glow.

Light emitting diode: LED

Opaque: if light can’t pass through something.

translucent/transparent: if light can pass through.

Shadow: Blocked light.

Electromagnetic energy:Energy that reaches from the sun to the earth.

Invisible spectrum: colours we can’t see

Colour spectrum/ visible spectrum: everything we can see

Ultraviolet: higher frequency than violet

Infrared: has longer wavelengths and generates heat

Angle of incidence: the angle of reflection

Refraction: bending of light