Light short 2

Question 1

What is the refractive index of water ?

Answer 1

n[w] = 1.33

Question 2

The refractive index of medium 1 with respect to medium 2 formula is

Answer 2

n^12 = speed of light in medium 2/speed of light in medium 1 = v^2/v^1

Question 3

Relative refractive index formula

Answer 3

n^21 = speed of light in medium 1/speed of light in medium 2 = v^1/v^2

Question 4

Absolute refractive index formula.

Answer 4

n[m]= speed of light in air/speed of light in medium = c/v

Question 5

What is absolute refractive index ?

Answer 5

It is the ratio of the velocity of light in vacuum to the velocity of light in the medium.

Question 6

Light travels fastest in vacuum with speed of

Answer 6

3 x 10^8 M s^-1

Question 7

What is the refractive index

Answer 7

The refractive index is a measurement of how much a light ray bends when it passes from one medium to another.

Question 8

Why does refraction occur ?

Answer 8

Refraction is due to change in the speed of light as it enters from one transparent medium to another.

Question 9

Formula 1

Answer 9

1/v + 1/u = 1/f

Question 10

Formula 2

Answer 10

m = Hi/Ho

Question 11

Formula 3

Answer 11

m = Hi/Ho = -v/u

Question 12

What is [u] ?

Answer 12

The distance of the object from its pole is called the object distance (u)