Question

1.which of the three media A ,B or C has maximum optical density
2. Through which of the three media, will the speed of light maximum.
3. will the refractive index of B relative to C be more than unity or less than unity
4. will the light travelling from A to B bend towards or away from the normal ​

Answer 1

1)Medium C has maximum optical density.

2) Medium A will have the speed of light fastest through it.

3) Less than unity.

4) the light travelling from A to B bend towards  the normal.

Explanation:

1)

Medium c has maximum optical density because with respect to the same angle of incidence against the same medium air, it shows more deviation towards the normal than the other media.

This happens due to slowing of speed in that medium and the most dense medium will have the slowest velocity.

2)

Through the medium A the speed of the light will be the fastest of all because it shows least deviation towards the normal and hence its optical density is least.

3)

The speed of light in the medium B is faster than that of medium C so the refractive index of material B will be less than 1.

From the Snell's Law:

$\rm n_{_{CB}}=\frac{speed\ of\ light\ in\ medium\ C}{speed\ of\ light\ in\ medium\ B}$

4)

Since medium A optically less dense than the medium B so the light will bend towards the normal while it passes from the medium A to B.

Answer 2

Answer:

1. C has maximum optical density

2. A is the correct answer

3. less than unity

4. both will bend towards