Question

The velocity of light in air is 3 X 10^8 m/s and the velocity of light in glass slab is 2 X 10^8 m/s. Find the refractive index of glass? ans(1.5)​

Answer 1

Answer:

kisi bhi cheez ka refractive index find karne ka matlab hota hai. Speed of light in air by jis medium ka aapko find karna hai.

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Answer 2

Answer:

• The refractive index (μ) of glass is 1.5 .

Given:

1. Speed of light in air (c) = 3 × 10⁸ m/s.
2. Speed of light in glass slab is (v) = 2 × 10⁸ m/s.

Explanation:

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Refractive Index:

Refractive Index is the ratio of the velocity of light in a vacuum / air to its velocity in a given medium (slab, water etc.)

Units:

• It has no units.

Dimensional Formula:

• M⁰ L⁰ T⁰

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From the Formula we Know,

⇒ μ = c / v

Where,

• μ denotes refractive index.
• c denotes speed of light in air.
• v denotes speed of light in glass slab.

Now,

⇒ μ = c / v

Substituting the values,

⇒ μ = 3 × 10⁸ m/s / 2 × 10⁸ m/s

⇒ μ = 3 × 10⁸  / 2 × 10⁸

⇒ μ = 3 / 2

⇒ μ = 1.5

⇒ μ = 1.5

∴ The refractive index (μ) of glass is 1.5 .

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