Refraction

Question 1

What is the refractive index?

Answer 1

A ratio, specific to each material

N=sin@1/sin@2

Question 2

Snell’s law: which angle comes where in the equation

Answer 2

nG = sin@A/sin@G

Question 3

What does the refractive index of a material depend on?

Answer 3

The frequency of the incident light

Question 4

What is the critical angle?

Answer 4

The incident angle at which the refracted Ray becomes 90 degrees to the normal.
Total internal reflection occurs at any incident angle above the critical

N=1/sin@c

Question 5

What happens to the light when it travels from a high refractive index to a low refractive index?

Answer 5

It bends away from the normal

Question 6

What happens to the light when it travels from a low refractive index to a high refractive index?

Answer 6

It bends towards the normal

Question 7

How are angles always measured?

Answer 7

From the normal

Question 8

Why is a spectrum produced when white light is passed through a glass prism?

Answer 8

Different frequencies of light have different refractive indices

Question 9

What happens to the speed frequency and wavelength of the light when it passes from a low refractive index to a high refractive index?

Answer 9

Speed decreases
Frequency stays the same
Wavelength increases

Question 10

What happens to the speed frequency and wavelength of the light as it passes from a high refractive index to a low refractive index?

Answer 10

Speed increases
Frequency stays the same
Wavelength decreases