7.4 REFRACTION Flashcards
1
Q
What is refraction?
A
The ‘bending’ of light when light travels from one medium to another
2
Q
Why does refraction happen?
A
Because the speed of light is different in different mediums
3
Q
How does light travel in a vacuum?
A
Constant speed
4
Q
How does light travel in a denser medium?
A
Slower than the speed in a vacuum
5
Q
Why does light bend?
A
Because light is slower in a denser medium, when it speeds up, it bends back.
6
Q
Where does the change of direction happen?
A
At the boundary, or the interface between two medias
7
Q
What is real depth?
A
The real depth of something due to refraction
8
Q
What is apparent depth?
A
What the brain thinks the depth of something is (Shallower)
9
Q
Formula for refractive index
A
Refractive index = speed in vacuum / speed in medium
10
Q
A
