optics

Question 1

refraction

Answer 1

change in speed of a wave in a new medium

Question 2

refractive index

Answer 2

ratio tells you how much slower light travels in medium compared to vacuum/air

Question 3

snells law

Answer 3

n1sin01=n2sin02

Question 4

critical angle

Answer 4

angle of incidence that results in light reflected along the boundary

Question 5

conditions for total internal reflection

Answer 5

-light must be in a higher n ( refractive index)
-angle of incidence > critical angle

Question 6

Coherent

Answer 6

2 sources of waves are coherent if they have identical frequency and constant phase difference

Question 7

diffraction

Answer 7

when waves pass through a gap and spread out

Question 8

fringe spacing formula

Answer 8

wavelenght x distance between slits / slit seperation

Question 9

order formula

Answer 9

grating spacing x sin0 /wavelength

Question 10

About single slit

Answer 10

-central maximum very bright compared to fringes
- its double the width of the fringe