Question

What do you conclude about the speed of light in diamond if the refractive index of diamond is 2.41? way from the mirror. Does the image become smaller or larger? What do you observe?

Answer 1

µ = 2.41; Ca = 3 × 10⁸ ms [Velocity of light]

µ = \(\frac{Speed\, of\, light\, in\, air}{Speed\, of\, light\,in\, diamond}\) = \(\frac{C_a}{C_d}\)

C_d = \(\frac{c_a}{µ}\) = \(\frac{3 \times 10^8}{2.41}\) = 1.245 x 10⁸ m/s

∴ Speed of light decreases when the light ray travels from air to diamond.