Wave Optics Tes...

An astronomical telescope has a large aperture to

A very thin film in reflected white light appears

The apparent wavelength of the light from star moving away from the earth is 0.2% more than its actual wavelength.Then the velocity of the star is 

Astronauts look down on earth surface from a space ship parked at an altitude of $$500$$ km. They can resolve object of the earth of the size (It can be assumed that the pupils diameter is 5 mm and wavelength of light is $$500$$ nm)

An observer moves with a velocity v towards a source. If actual velocity of light from source is c, its velocity relative to the observer is

Wavelength of light used in an optical instrument are $$\lambda_1 = 4000 A^o  and \lambda_2 = 5000 A^0$$, then ratio of their respective resolving powers (corresponding to $$\lambda_1   \ and  \ \lambda_2$$) is

The colour of bright fringe nearest to central achromatic fringe in the interference pattern with white light will be 

The interfering fringes formed by a thin oil film on water are seen in yellow light of sodium lamp. We find the fringes 

Light transmitted by nicol prism is

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