What is the best term to describe how light waves from a star are affected as the star moves away from earth? a redshift b blueshift c diffraction d comological redshift

As a star moves AWAY from Earth (or the distance between ANY light source and ANY observer increases, no matter which one is moving or how fast), the waves measured by the observer are LONGER than the waves actually radiated from the source.

Since the longest visible light waves are the red ones, this lengthening of the observed waves is called "red-shift", even if the waves involved are not visible ones. (choice-A)

the answer is a. at the equator

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.