Light travels with different speeds in different mediums.

Sound travels with different speeds in different mediums.

Statement I: Lights of different colors travel with different speeds in vacuum. Statement II: Speed of light depends on medium.

An obliquely incident light ray bends at the surface due to change in speed, when passing from one medium to another. The ray does not bend when it is incident normally. Will the ray have different speed in the other medium ?

Mark the correct light ray as it travels through different mediums.

Why do different planets have different escape speeds?

Assertion:- Different colours of light have same velocity in vaccum, but they have differnet velocites in any other transparent medium. Reason:- For different colours, refractive index of transparent medium has different values.

Light of wavelength 500nm traveling with a speed of 2.0xx10^(8)ms^(-1) in a certain medium enters another medium of refractive index 5//4 times that of the first medium. What are the wavelength and speed in the second medium?

Light waves of wavelength 5460 A, emitted by two coherent sources, meet at a point after travelling different paths. The path difference between the two wave trains at that point is 2.1 mum . then phase difference will be ?

(I) How does the refractive index of a medium depends on the wavelength of light used? (II)Which is greater, angle of incidence or angle of refraction, when light travels from denser medium to rarer medium.

A: When a narrow pulse of light is sent through a medium, it doesn't retain its shape as it travels through the medium. R: Since the speed of propagation in a medium depends on wavelength , different wavelength components of the pulse travel with different speeds.