Waves

Question 1

Diffuse / Scattered reflection

Answer 1

Boundary is bumpy
Normals are different
Light reflected in different directions

Question 2

Specular reflection

Answer 2

Boundary is flat
Normals are all in the same direction
All rays are reflected in same direction

Question 3

Electromagnetic Spectrum

Answer 3

Radio
Micro
Infrared
Visible light
Ultraviolet
X-Ray
Gamma

Robots make impressive videos using x-ray gadgets

Question 4

Uses of Electromagnetic Waves

Answer 4

Radio
communication such as television and radio.

Micro
cooking food and for satellite communications

Infrared
electrical heaters, cookers for cooking food, and by infrared cameras which detect people in the dark.

Visible Light
Fibre optic communication
Photographs

Ultraviolet
Detecting forged banked notes
Fluorescent lights

X-Rays
Medical imaging

Gamma rays
Sterilise medical equipment
Treat cancer