Question

Assertion(A): The speed of light in water is greater than that of benzene. Reason(R): The speed of light in a medium is high when refractive index of the

medium is low?

Which of the following is correct?

A) A and R are true and R supports A

B) A and R are true but R does not support A

C) A is true but R is false

D) A is false but R is true​

Answer 1

Answer:

Hope its helpful

Explanation:

Answer 2

Given:

Assertion(A): The speed of light in water is greater than that of benzene.

Reason(R): The speed of light in a medium is high when refractive index of the medium is low.

To find:

Correct option among the following?

Solution:

First of all, we need to remember a few informations:

• Refractive index of water is 1.33
• Refractive index of benzene is 1.50

So, now we know that :

$\boxed{ \sf \mu = \dfrac{speed \: of \: light \: in \: vacuum}{speed \: of \: light \: in \: medium} }$

So, we can say:

$\boxed{ \sf \mu \propto \dfrac{1}{speed \: of \: light \: in \: medium} }$

• So, higher the refractive index $(\mu)$ , lesser will be velocity of light in that medium.

• Since water is having lower refractive index, speed of light will be higher in water as compared to benzene.

With all these knowledge , we can say:

Assertion and Reason is true and R supports A.