Wave Optics Tes...

Who proposed wave nature of light ?

The wavelength of $$\text{H}_a$$ line in hydrogen spectrum was found $$6563\ \text{A}^o$$ in the laboratory. If the wavelength of same line in the spectrum of a milky way is observed to be $$6586\ \text{A}^o $$ then the recessional velocity of the milky way will be

A star is receding away from earth with a velocity of $$10^5\ \text{ms}^{-1}.$$ If the wavelength of its spectral line is $$5700\ \text{A}^o $$ then Doppler shift will be

Earth is moving towards a stationary star with a velocity $$100\ \text{kms}^{-1}$$. If the wavelength of light emitted by the star is $$5000\ \text{A}^o $$, then the apparent changes in wavelength observed by the observer on earth will be 

The wavelength of light received from milky way is 0.4% higher than that from the same source on earth. The velocity of milky way with respect to earth will be

Dichorism means

The wave theory in its original form was first postulated by 

Two point white dots are 1 mm apart on a black paper. They are viewed by eye of pupil of diameter 3 mm. Approximately what is the maximum distance up to which these dots can be resolved by the eye.

A spectral line is obtained from a gas discharge tube at $$5000A^o $$ . If the rms velocity of gas molecules is $$10^5 ms^{-1}$$ then the width of spectral line will be

A rocket is receding away from earth with velocity $$0.2\text{c}.$$ The rocket emits signal of frequency $$4 \times 10^7\ \text{Hz}.$$ The apparent frequency of the signal produced by the rocket observed by the observer on earth will be