The speed of light depends
A. on elasticity of the medium only

B. on inertia of the medium only

C. on elasticity as well as inertia

D. neither on elasticity nor on inertia

The wave fronts of a light wave travelling in vacuum are given by x + y + z = c. The angle made by the direction of propagation of light with the X-axis is

Whether the diffraction effects from a slit will be more clearly visible or less clearly, if the slit-width is increased?

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

The wavefronts of light coming from a distant source of unknown shape are nearly

When light is refracted, which of the following does not change?

The wavelength of light in a medium is λ = λ₀/μ, where λ is the wavelength in vacuum A beam of red light (λ₀ = 720 nm) enters into water. The wavelength in water is λ = λ0/μ = 540 nm, to a person under water does this light appear green?

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.

When light is refracted into a medium,

If we put a cardboard (say 20 cm x 20 cm) between a light source and our eyes, we can’t see the light. But when we put the same cardboard between a sound source and our ear, we hear the sound almost clearly. Explain.

Light waves travel in vacuum along the X-axis, which of the following may represent the wave-fronts?