Question

12. Light enters a glass plate of refractive index 1.50. What will be the value of speed of light
in this glass plate (speed of light in
vaccums 3 lakh km/s)​

Answer 1

Answer:

Refractive Index = Speed of light in vacuum / Speed of light in glass plate

1.50 = 3*10^8 m/s / Speed of light in glass plate

Speed of light in glass plate = 3*10^8 m/s  / 1.50

Speed of light in glass plate = 2*10^8 m/s