Question

Refractive index of Glass is 1.5. Time taken for light to pass through a glass plate of thickness 10 centimetre is

Answer 1

refractive index of glass is 1.5

hence, speed of light in glass would be:

(3*10^8) / 1.5

which is 2*10^8 m/s

10cm = 0.1m

time taken = distance/speed

= 0.1/2*10^8
= 5*10^-7

Answer 2

Answer:

Refractive index of glass would be=(3×10^8)/1.5

=2×10^8 m/s

10 cm = 0.1 m

Time taken = Distance ×speed

=0.1/2×10^8=

5×10^-7