Light Flashcards
1
Q
Energy
A
Is the ability to do work i.e move the unit of energy is the joule
2
Q
Plants use of light
A
To make food (Photosynthesis)
Photo = light
Synthesis = to make
3
Q
Humans use of light
A
Solar panels, Crooke’s radiometer
4
Q
Refraction
A
The bending of light from one medium to another e.g air to water
5
Q
Light
A
Light is a form of energy
6
Q
Refraction (1)
A
Light rays are reflected towards the denser material
7
Q
Convex or converging lense
A
Used to bring rays together, Used to fix long sightedness, or hypermetropia
8
Q
Concave or diverging lens
A
Used to spread rays apart, Used to fix short sightedness, or myopia
9
Q
White light
A
White light is not really white is a mixture of the 7 colours of the spectrum
10
Q
Dispersion
A
Is the splitting of white light into its constituent colours due to refraction
