A spectrum line λ = 6000 Å of a star is found to be shifted 0.1 Å towards longer wavelengths from the position of the same line in terrestrial laboratory. Assuming the shift to be due to Doppler effect, what is the velocity of the star?

A spectrum line λ = 6000 Å of a star is found to be shifted 0.1 Å t

1.	A spectrum line λ = 6000 Å of a star is found to be shifted 0.1 Å towards longer wavelengths from the position of the same line in terrestrial laboratory. Assuming the shift to be due to Doppler effect, what is the velocity of the star?
A.	5 × 104 m/sec
B.	5 × 103 m/sec
C.	2.5 × 104 m/sec
D.	2.5 × 103 m/sec
Answer» C. 2.5 × 104 m/sec