Light Flashcards
1
Q
Energy
A
Is the ability to do work (i.e, move)
Unit of energy is the joule
2
Q
Plants use of light
A
To make food
(Photosynthesis) ~ to make
Photo~ light
Synthesis~ to make
3
Q
Humans use of lights
A
Solar panels
Crooke’s radiometer
4
Q
Luminous
A
Objects that give off a light are called luminous
E.g ~ sun, lightbulb.
5
Q
Non-luminous
A
Objects that do not give off light are called non-luminous
E.g ~ a book, my face.
6
Q
Speed of light
A
is 300,000,000 m/s
7
Q
Light travels in straight lines
A
We show this by blocking light from a bulb with card
8
Q
Light does not travel around corners
A
Blocking light leads to shadows
9
Q
Solar eclipse
A
When the moon passes between the sun and the earth
10
Q
Light
A
Is a form of energy
