Due to Doppler effect, the shift in wavelength observed is 0.1 Å, for a star producing a wavelength 6000 Å. The velocity of recession of the star will be

Due to Doppler effect, the shift in wavelength observed is 0.1 Å, for

1.	Due to Doppler effect, the shift in wavelength observed is 0.1 Å, for a star producing a wavelength 6000 Å. The velocity of recession of the star will be
Answer» 20 km `cdot s^(-1)` `2.5` km `cdot s^(-1)` 10 km `cdot s^(-1)` 5 km `cdot s^(-1)` Solution :Doppler shift, `Delta lambda = lambda v/c` `therefore v=c(Delta lambda)/ lambda = (3xx 10^(8))xx0.1/6000` `=5 XX 10^(3) m//s = 5 `km/s The OPTION (D) is correct.