A spaceship is traveling in space just outside the earth.
It emits a light signal of
wavelength λ =
632
nm. On earth, telescopes detect this as light of wavelength λʹ =
643 nm.
4)
In which direction is the spaceship moving?
A) toward
s the earth
B) away from the earth
5)
How fast is the spaceship moving relative to earth?
A) 5.22×10
6
m/s
B) 3×10
8
m/s
C) 2.85×10
8
m/s
D) 5.13×10
6
m/s