Doppler Effect in Light

The velocity of star is $10 \mathrm{m} {\mathrm{s}}^{-1}$ and frequency of emitted light is $4.5\times {10}^{14} \mathrm{Hz}$. If the star is moving away, then apparent frequency will be.

When redshift occurs, the perceived frequency of the wave would

When blueshift occurs, the perceived frequency of the wave would 

How do you explain red shift?

What is blue shift in Doppler effect?

If a star emitting orange light moves away from the earth, its colour

Wavelength of light from moving star observed on the earth is found to decrease by $0.05\%$. Relative to earth, star is

Wavelength of ${\mathrm{H}}_{\mathrm{\alpha }}$ line in hydrogen spectrum is $656\times {10}^{-9}\mathrm{ }\mathrm{m}$ whereas wavelength of ${\mathrm{H}}_{\mathrm{\alpha }}$ line in the spectrum of a distant galaxy is 706 nm. Speed of galaxy w.r.t. earth is

A plane electromagnetic wave of frequency ${\mathrm{w}}_0$ falls normally on the surface of a mirror approaching with a relativistic velocity $\mathrm{\upsilon }$ . Then frequency of the reflected wave will be $\left(\mathrm{g}\mathrm{i}\mathrm{v}\mathrm{e}\mathrm{n}\mathrm{ }\mathrm{\beta }=\frac{\mathrm{\upsilon }}{\mathrm{c}}\right)$

Which of the following explain that all galaxies are receding from us?

A star is moving away from Earth and shift in spectral line of wavelength $5700\mathrm{ }\mathrm{Å}$ is $1.90\mathrm{ }\mathrm{Å}$ . Velocity of the star is

A star emitting radiations of wavelength $5000\mathrm{ }\mathrm{Å}$ is approaching earth with a velocity of $1.5\times {10}^6\mathrm{ }\mathrm{m}{\mathrm{s}}^{-1}$ . Change in wavelength of radiations as received on the earth is

A star is moving away from us with a relative velocity of $\frac{c}{3}$ where $c$ is the speed of light. If the star emits the first line of Lyman series of $H$- atom, the apparent wavelength observed by us will be approximately:

A star is moving away from us with a relative velocity of $\frac{c}{3}$ where $c$ is the speed of light. If the star emits the first line of Lyman series of $H$-atom, the apparent wavelength observed by us will be approximately:

If a star is moving towards the earth, then the lines are shifted towards

When the wavelength of light coming from a distant star is measured it is found shifted towards red. Then the conclusion is

The frequency of a radar is $780 \mathrm{MHz}$. The frequency of the reflected wave from an aeroplane is increased by $2.6 \mathrm{KHz}$. The velocity of airplane in $\mathrm{m} {\mathrm{s}}^{-1}$ is :-

An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency $10 \mathrm{GHz}$. What is the frequency of the microwave measured by the observer? (Speed of light $=3\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$).

What is the shift in the wavelength of a star emitting light of wavelength $5000 \stackrel{\mathrm{o}}{\mathrm{A}}$ and moving towards earth with a velocity of $1.5\times {10}^6 \mathrm{m} {\mathrm{s}}^{-1}$?

When a laser beam returns after reflection from an aeroplane, the observed change in frequency is $1\mathrm{\%}$, then the speed of the aeroplane is ($\mathrm{c}$ is the velocity of light)