Frequency of the em signal emitted by a rocket I `4xx10^(7)Hz`. If apparent frequency observed on earth is `3.2xx10^(7)Hz`, then velocity with which rocket is moving away is [speed of light = c]

A star moves away from earth at speed 0.8 c while emitting light of frequency 6 xx 10^(14) Hz . What frequency will be observed on the earth (in units of 10^(14) Hz) (c= speed of light)

The frequency of violet light is 7.5 xx 10^(14) Hz. Find its wavelength in (i) nm, (ii) Å. Speed of light c = 3 xx 10^(8) m s^(-1)

An astronaut is approacing the moon. He sends a radio wave of frequency 5 xx 10^(9) Hz towards the moon. The frequency of the radio echo received by him has a frequency 9 xx 10^(4) Hz more than that of real frequency. The relative velocity of the rocket with respect to the moon is

Velocity of star is 10^(6)m//s and frequency of emitted light is 4.5X10^(14)Hz . If star is moving away, then apparent frequency will be