Question

for each star, determine how its light would be shifted. not all choices may be used, and some may be used more than once. a blue giant moving transversely at 30.3 km/s a blue dwarf moving toward earth at 10.9 km/s a yellow dwarf moving away from earth at 8.3 km/s a red giant moving transversely at 20.5 km/s a blue giant moving toward earth at 5.3 km/s

Explanation:

1. When a star moves transversely (perpendicular to the line - of - sight), there is no change in the distance between the star and Earth along the line - of - sight. So, there is no Doppler shift in the wavelength of its light.
2. When a star moves towards Earth, the wavelength of its light is compressed, resulting in a blueshift.
3. When a star moves away from Earth, the wavelength of its light is stretched, resulting in a redshift.

For a blue giant moving transversely at 30.3 km/s, there is no change in the distance along the line - of - sight, so no wavelength shift.
For a blue dwarf moving toward Earth at 10.9 km/s, it will have a blueshift.
For a yellow dwarf moving away from Earth at 8.3 km/s, it will have a redshift.
For a red giant moving transversely at 20.5 km/s, there is no wavelength shift.
For a blue giant moving toward Earth at 5.3 km/s, it will have a blueshift.

Answer:

1. no wavelength shift
2. blueshift
3. redshift
4. no wavelength shift
5. blueshift