Question

As viewed from Earth, the light from a star has
lower frequencies than the light emitted by the
star because the star is
(1) moving toward Earth
(2) moving away from Earth
(3) stationary

Answer 1

If the emitting source is moving towards you, it means you'll get signals faster. As a consequence, the frequency will be higher.

Conclusion : the star is (2) moving away from Earth

Answer 2

The light from a star has lower frequencies than the light emitted by the star, when viewed from Earth, as the star is moving away from Earth.

How movement of a star from earth affect frequency of its light?

The frequency of the light emitted by the star is changed with its movement from earth.

• When a star moves towards the Earth, then the lights of star shifted to the higher frequency.
• When a star moves away the Earth, then the lights of star shifted to the lower frequency.

Thus, the light from a star has lower frequencies than the light emitted by the star, when viewed from Earth, as the star is moving away from Earth.

Learn more about the frequency of light here;

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