Refraction

Question 1

What is refraction

Answer 1

a deviation of the straight line path of a light wave it is due to the speed of light as it enters a medium of different optical density a ‘faster or ‘slower medium

Question 2

What does the speed of light depend on

Answer 2

teh optical denisty of the medium

Question 3

what is teh refractive index

Answer 3

indication of teh ability of a medium to slowdown light

Question 4

What happens when light enters a slower medium

Answer 4

when light enters a slower medium (high refractive index) the relative speed of light is slower
therefore the refracted ray is reflected towards the normal

Question 5

What happens when light enters a faster medium

Answer 5

when light enters a faster medium (low refractive index) the relative speed of light is faster
therefore teh refracted ray is refracted away from teh normal

Question 6

In what medium can light travel faster

Answer 6

LIght travels fastest in gases because there are less particles to bump into rather than a slow solid

Question 7

How do you calculate refractive index

Answer 7

refractive index divided by speed of light = speed of light in material
refractive index divided by speed of light in material = speed of light
speed of light x speed of light in material = refractive index

Question 8

What is total internal reflection

Answer 8

as an angle of incidence on a transparent surface is icnreased more light is reflected and less light is refracted

Question 9

what is critical incident

Answer 9

when light eneters a less optically dense medium it is refracted away from teh normal at critical incident angle of refraction is 90 degrees