Question

The velocity of light in vacuum is 3 x 10^8 m/s and in glass is 2 x 10^8 m/s. The refractive index of glass is?

Answer 1

Answer :

›»› The refractive index of glass is 1.5.

Explanation :

Given :

• Velocity of light in vacuum = 3 × 10⁸ m/s.
• Velocity of light in glass = 2 × 10⁸ m/s.

To Find :

• Refractive index of glass = ?

Formula required :

Formula to calculate the refractive index of glass is given by,

→ μ = c/v.

Here,

• μ is the refractive index of glass.
• c is the velocity of light in vacuum.
• v is the velocity of light in glass.

Solution :

As we are given with the velocity of light in vacuum and velocity of light in glass them we know the required formula, that is,

→ μ = c/v.

By using the formula to calculate refractive index of glass and substituting all the given values in the formula, we get :

→ μ = 3 × 10⁸/2 × 10⁸

→ μ = 3/2

→ μ = 1.5

Hence, the refractive index of glass is 1.5.

Answer 2

Answer:

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