3.16 Plane mirrors

For these type of mirrors:

1. The images are virtual (fake/not real)
2. The image is the exact size of the object
3. It is reflected as the same distance from the object
4. it is upright
5. And the image is laterally inverted

3.15 Angle of incidence and Angle of reflection

The angle of incidence and the angle of reflection are the same (Proves that the light is reflected at the same angle)

3.14 Light waves

Lightwaves are transverse and they can be reflected, refracted and diffracted


Definition:
Refraction: The bending of light when it passes between materials of different density.
Reflection: The change in direction of a light wave so that it returns into medium from which it originated.
Diffraction: Waves spreading into the shadow when they pass an edge.

3.12 & 3.13 Electormagnetic radiations

USES:
Radio waves: broadcating and communication (radios)
Microwaves: Cooking and satelite communication
Infrared: Heaters and night vision
Visible light: to see and for photography
Ultraviolet: Fluorescent lamps
x-rays: observing inner structures of materials and objects (xray scanner in a hospital)
Gamma rays: sterilising food and medical equipment
Dangers

Microwaves: Internal heating of body tissue

Infrared: Skin burns

Ultraviolet: Damage to surface cells and blindness

Gamma rays: Cancer and mutation (similar with xrays but not as bad)