contestada

Compared to a stationary galaxy, light from a galaxy that is moving away from earth will appear _____.
a. bluer
b. redder
c. the same

Respuesta :

Griffling
"B" When an object moves away from us, the light is shifted to the red end of the spectrum, as its wavelengths get longer.

Answer:

B) Redder

Explanation:

Think of it like this; a car passes by you, as it goes, it's horn gets louder, and then starts to become quieter as it moves further away. Redshift works the same way. When an galaxy starts to move away from Earth, it's light appears to be redder. (If it was moving closer to Earth, it would most likely become bluer.)