The index of refraction of fused quartz is 1.472 for light of wavelength 400 nm and is 1.452 for light of wavelength 760 nm. Find the speeds of light of these wavelengths in fused quartz.

Find the range of frequency of light that is visible to an average human being (400 nm < λ < 700 nm).

The wavelength of sodium light in air is 589 nm. (a) Find its frequency in air. (b) Find its wavelength in water (refractive index = 133). (c) Find its frequency in water. (d) Find its speed in water.

The speed of the yellow light in a certain liquid is 2.4 × 10⁸ m s^-1. Find the refractive index of the liquid.

Two narrow slits emitting light in phase are separated by a distance of 1.0 cm. The wavelength of the light is 5.O × 10^-7 m. The interference pattern is observed on a screen placed at u distance of 1.0 m. (a) Find the separation between the consecutive maxima. Can you expect to distinguish between these maxima? (b) Find the separation between the sources which will give a separation of 1.0 mm between the consecutive maxima.