Refraction of light

Question 1

What stays constant when a wave is refracted

Answer 1

frequency stays constant
Speed and wavelength will both change
ie speed increases wavelength must also increase

Question 2

Absolute refractive index equation (n)

Answer 2

SinØ1/SinØ2
Where Ø1 is angle of incidence
And Ø2 is angle of refraction

Question 3

Refractive index definition

Answer 3

The ability of a substance change the direction and speed of light

Question 4

Ø1 is always the

Answer 4

Less dense substance

Question 5

Refractive index depends on

Answer 5

The density and frequency of the light

Question 6

Which colour light has the lowest refractive index

Answer 6

Red since largest wavelength

Question 7

Calculating angle of dispersion

Answer 7

Find angle of one of the refracts and the angle of the other ant take small away for, larger angle

Question 8

Related equations for refraction

Answer 8

SinØ1/SinØ2 = lambda 1/ lambda 2 = v1/V2 = n

Question 9

Critical angle

Answer 9

The angle of incidence such that the angle of refraction is 90°

Question 10

Formula for critical angle

Answer 10

SinØc = 1/nmedium

Question 11

Applications of total internal reflection

Answer 11

Used in optical fibres for transmission of I fo by means of laser light, used for communications
And used in periscopes or binoculars