Question

Why does the Doppler effect lead to a shift in the atomic emission frequencies of hydrogen atoms in a star but a broadening of the atomic emission frequencies of hydrogen atoms in a gas?

Answer 1

Why does the Doppler effect lead to a shift in the atomic emission frequencies of hydrogen atoms in a star but a broadening of the atomic emission frequencies of hydrogen atoms in a gas?

Doppler widening is the expanding of ghostly lines because of the Doppler impact brought on by an appropriation of speeds of iotas or particles. Distinctive speeds of the emanating particles result in various Doppler moves, the aggregate impact of which is the line expanding.

A specific case is the warm Doppler expanding because of the warm movement of the particles. At that point, the expanding depends just on the recurrence of the unearthly line, the mass of the transmitting particles, and their temperature, and in this manner can be utilized for surmising the temperature of a discharging body.

In the event that the hydrogen molecule moves at a large portion of the speed of light, the hypothesis of the Doppler impact (utilizing the wave property of light) shows us that we will get just 50% of the recurrence of the energized state.

This implies the photon got from the moving molecule will have just a large portion of the vitality of excitation.