Phy Ch2-3 (p.1-6)

Question 1

Why does refraction happen

Question 2

Laws of refraction

Answer 2

Same plane, constant ratio sine

Question 3

Snell’s law

Question 4

Refractive index

Question 5

Speed of light in vacuum

Question 6

Speed of light in vacuum/in medium = refractive index

Question 7

Light through prism

Answer 7

Dispersion, spectrum, diff speed, mixture

Question 8

Lateral displacement (parallel)

Question 9

Critical angle

Answer 9

refracted ray travels along the boundary between the two media (angle of refraction = 90)

Question 10

What happens when angle of incidence <, = or > critical angle

Question 11

What happens when angle of incidence gradually approaches critical angle

Question 12

Total internal reflection only happens when

Question 13

Use snells law and critical angle to find refractive index

Question 14

Applications of total internal reflection

Question 15

Explain a mirage and optical fibres

Question 16

Lenses (2,2)

Question 17

Features and descriptions of lenses

Question 18

Lens thickness and lateral displacement

Question 19

Focal length depends on

Question 20

Parallel rays through convex lens

Question 21

Formation of real/virtual images with convex lenses

Question 22

Convex lens construction rules