Wave Optics Physics - Wave Optics

de-Broglie wavelength is :

Two sources of monochromatic light in coherent, when their :

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

The wavelength of which colour is minimum ?

Width of interference fringe is :

What is wave-front ?

What do you mean by diffraction of light ?

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.

What is Malus Law ?

What do you mean by resolving limit of a telescope ? What will be the resolving limit of a telescope whose objective has aperture of 5 m if the wavelength of the light is 5000 Å ?

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.

Explain the resolving power of an optical instrument. Write the formula for resolving power of telescope and microscope. Why is the resolving power of electron microscope more than that of optical microscope ?