Question

27. Assertion :Refractive Index
does not have units. Reason: It
is a ratio of two similar
quantities.
O Both A and R are true, and R is the correct explanation of the assertion.
O Both A and Rare true, but Ris not
the correct explanation of the
assertion.
O A is true, but Ris false.
O A is false, but R is true.​

Answer 1

Answer:

Both the assertion and reason are true.

Explanation:

Refractive index=Speed of light in vacuum/Speed of light in medium

So, it is simply the ratio of two similar physical quantities that is light. Therefore, it has no unit.

Hope it will help..

Mark the brainliest

Answer 2

Both Assertion and Reason are true and Reason is the correct explanation of the assertion.

Explanation:

• Refractive index is a measure of reduction in the velocity of light in a medium.

• Refractive Index is a value calculated from the ratio of the speed of light in a vacuum to that in a second medium of greater density.

• Refractive index is a material property that describes how the material affects the speed of light travelling through it.

• The refractive index of a material, expressed in a number, shows how much a path of light is bent or refracted when it enters that material.

• Refractive index is given as:

$n=\frac{c}{v}$

• c is the velocity of light in vacuum and v is the velocity of light in the medium.

• Since it is ratio of velocities, so it has no units.