Question

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Answer 1

Answer:

a) Name of Material λ (nm) refractive index no. n

Kerosene                   1.39

Explanation:

b)Speed of light in vacuum=3×10⁸m/sec

Let the speed of light in kerosene be 'x' m/sec.

Given refractive index of Kerosene=1.44

We have,

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

⇒1.44=3×10⁸/x

⇒x=3×10⁸/1.44

⇒x=2.08×10⁸m/sec.

Therefore, the speed of light in Kerosene=2.08×10⁸m/sec.

Answer 2

Explanation:

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