Optics:Intro and production of light Flashcards
0
Q
What is the speed of light?
A
10(8) times 3
1
Q
How much of the sun’s sunlight does Earth capture?
A
Only a tiny fraction
2
Q
How does light travel?
A
It travels in straight lines.
3
Q
What some pieces of evidence for the straight line nature of light?
A
Sharp shadows around objects like trees. This is also why you can see Earth’s shadow
4
Q
What is light?
A
.
5
Q
Explain the visible light spectrum.
A
.
6
Q
How is light produced?
A
.
7
Q
What are the two types of light producing objects.
A
Luminous objects- they can be a source of light (sun,candle,light bulb)
Non-luminous objects- tree,desk
