Wave Optics Physics - Wave Optics

de-Broglie wavelength is :

The wavelength of which colour is minimum ?

The fringe width in interference of light due to two coherent sources is :

Two sources of monochromatic light in coherent, when their :

Width of interference fringe is :

What do you mean by diffraction of light ?

What is wave-front ?

Why longitudinal waves cannot be polarised ?

"In microscope and telescope the value of resolving power should be enough alongwith high magnifying power." Comment on this statement.

State Brewster's law. Value of Brewster's angle for light of different colours is different for a transparent medium. Give reasons.

Explain the following giving reasons :
(i) When monochromatic light is incident and surface separating two media, the reflected and refracted light both have the same frequency as the incident frequency.
(ii) When light travels from a rarer medium to a denser medium, the speed decreases. Does this decrease in speed imply a reduction in the energy carried by the wave?
(iii) In the wave picture of light intensity of light is determined by the square of the amplitude of the curve. What determines the intensity in the photon picture of light ?

Write characteristics of Laser rays.

Define resolving power of a microscope. Write its formula. How will it be affected when
(i) the wavelength of incident light decreases and
(ii) the aperture of the objective decreases ?

What is Malus Law ?

What do you mean by coherent sources of light? How are these obtained in the laboratory ?

What is wave-front ? Use Huygen's principle of secondary wavelets to verify the laws of reflection.

Explain the laws of refraction of light waves on the basis of Huygen's theory of secondary wavelets.

What is interference of light? Find an expression for fringe width in 'Young's double slit experiment.

What is polaroid? Write its uses.

Differentiate between interference and diffraction.