1.

Calculate speed of light in water of refractive index 4/3. Given speed of light in air (c)= 3x10raose to the power 8 m/s

Answer»

ANSWER:

General formula:

REFRACTIVE INDEX of given medium (n) = Speed of light in air/ speed of light in given medium

Given:

n=4/3

speed of light in air= 3×10^8m/s

To FIND :

Speed of light in water

Solution:

Refractive index of water = speed of light in air/speed of light in water

so speed of light in water = speed of light in air/refractive index of water

speed  \: of \: light \: in \: water \:  =  \frac{3 \times 10 {}^{8} }{4 \div 3}

so speed of light in water = 2.25×10^8 m/s



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