Question

the refractive index of glycerine is 1.46 what is the speed of light in air if its speed in glycerine 2.05×108 m/s?​

Answer 1

Explanation:

The refractive index of glycerine = 1.46.

the speed of light in glycerine is 2.05 into 10 to the power 8 metre per second .

Refractive index= Speed of light in air /Speed of light in glycerine

1.46= speed of light in air /2.05x10^8m/s

speed of light in air = 1.46× 2.05×10^8m/s

= 2.99×10^8m/s

its nearly equal to =3x10^8 m/s

Thank you

Answer 2

The speed of light in air is 3×10⁸8m/s.

Given,

The refractive index of glycerine is 1.46.

The speed of light in glycerine is 2.05×10⁸ m/s.

To Find,

The speed of light in air.

Solution,

The formula for calculating the refractive index is

Refractive index= Speed of light in air /Speed of light in glycerine

In this question

Refractive index = 1.46

Speed of light in glycerine = 2.05×10⁸ m/s

1.46= speed of light in air /2.05x10⁸m/s

speed of light in air = 1.46× 2.05×10⁸m/s

speed of light in air = 3×10⁸8m/s

Hence, the speed of light in air is 3×10⁸8m/s.

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