Question

Refractive index of glass is 1.5 and that of water is 1.3 speed of light in water is 2.25 into 10 ki power 8 metre per second what is the speed of light in glass

Answer 1

Refractive index of glass = 1.5

Refractive index of water = 1.3

Speed of light in water = $2.25 \times 10^8$ m/s

Since, the refractive index of glass is greater than the refractive index of water. Hence, the speed of light will be lesser in the glass.

Speed of light in glass = $\frac{2.25 \times 10^8 \times 1.3}{1.5}$

Speed of light in glass = $1.95 \times 10^8$ m/s

Hence, the speed of light in the glass medium is $1.95 \times 10^8$ m/s

Answer 2

Explanation:

Refractive index of glass = 1.5

Refractive index of water = 1.3

Speed of light in water = 2.25 \times 10^82.25×108 m/s

Since, the refractive index of glass is greater than the refractive index of water. Hence, the speed of light will be lesser in the glass.

Speed of light in glass = \frac{2.25 \times 10^8 \times 1.3}{1.5}1.52.25×108×1.3

Speed of light in glass = 1.95 \times 10^81.95×108 m/s

Hence, the speed of light in the glass medium is 1.95 \times 10^81.95×108 m/s