Question

Mohan is performing an experiment with four different Optical media, he traced the path of Light in different media A, B, C, and D as below:
(i) Which of the following media has maximum optical density?
(a) A (b) C (c) D (d) B
(ii) Through which media, will the speed of light be maximum?
(a) B (b) C (c) D (d) A
(iii) Absolute refractive index of a medium is maximum in:
(a) A (b) B (c) C (d) D
(iv) Which is correct about the absolute refractive index of medium?
(a) A>B (b) C=B (c) D >A (d) A=C
(v) When light travels from medium A to D it will:
(a) Bend towards normal (b) bend away from normal
(c) pass straight without bending (d) reflect back to medium A

Answer 1

(i) (c) D

(ii) (d) A

(iii) (d) D

(iv) (c) D>A

(v) (a) Bends towards normal

THANKYOU!

Answer 2

(I) Maximum optical density is of medium (c). D.

(II) Maximum speed of light is in medium (d) A .

(III) (d) D has maximum refractive index.

(IV) Correct statement is (c) D>A.

(V) (a) Bend towards normal.

Define refractive index?

• Refractive index of any medium is explained as ratio of speed of light in vacuum and to that in the medium.
• $n=\frac{c}{v}$, where n is the refractive index, c is the speed of light in vacuum and v is speed of light in that particular medium.
• Larger optical density medium will have high refractive index which lowers the speed of light.
• Small optical density has lower refractive index and it leads to increased speed of light..

• Optical density of any medium is inversely proportional to the angle of refraction.