Question

(6). 1. ASSERTION: Higher is the refractive
index of a medium or denser the medium, lesser is
the velocity of light in that medium.
2. REASON: Refractive index is inversely
proportional to velocity.​

Answer 1

Answer:

Assertion is correct and (R) is the correct explaination of (A)

Answer 2

Assertion and reason both are true. Reason is the correct explanation for the assertion.

What is refractive index?

• Refractive index of any medium is the ratio of velocity of light in vacuum to light's velocity in the medium.
• Let n be the refractive index of the medium, v is the speed of light in that particular medium and c be the speed of light in vacuum or space.
• $n=\frac{c}{v}$
• The equation above states that refractive index of any medium is proportional inversely to the speed of light in that specific medium.
• Higher the refractive index of the medium, denser is the medium and lesser is the speed of light.
• Light travels faster in rarer medium as compared to when travelling through denser medium.