Light Flashcards
1
Q
What is Light?
A
A form of energy, it travels from the source outward as a wave
2
Q
Luminous objects
A
Give out light e.g. sun, light bulb
3
Q
Non - luminous objects
A
Reflect light e.g. moon, mirror
4
Q
The speed of light in a vacuum is:
A
300,000,000 m/s (much faster than sound
5
Q
Opaque
A
Light rays can’t pass through
6
Q
Transparent
A
Light rays can pass through
7
Q
Translucent
A
Some light rays can pass through
8
Q
Reflection
A
Light ray bouncing off a surface
9
Q
Absorbed
A
When light is taken into a material and not reflected
10
Q
Refraction
A
A ray is bent as it passes from 1 medium to another
11
Q
Incident ray
A
The light ray hitting a surface
12
Q
Angle of reflection
A
Angle between normal and reflected ray
13
Q
Shadow
A
Dark area caused by an opaque object blocking light rays
