6.1: What is light? Flashcards
1
Q
light
A
way of transferring energy
2
Q
light sources
A
give out light. they are luminous
3
Q
why can light travel through space
A
light doesn’t need a medium to travel through
4
Q
infrared radiation
A
another way of transferring energy
5
Q
shadows
A
dark areas where something blocks out light
6
Q
why are shadows formed?
A
because light travels in straight lines and doesn’t bend around corners
7
Q
small light source
A
full shadow - umbra
sharp edges
8
Q
large or spread out light source
A
partial shadow - penumbra and umbra
fuzzy edges
9
Q
image
A
point from which rays of light seem to have originated
