Use the spectrum readings from the sun (upper) and a star (lower) to answer the question.

Question

An illustration shows the spectrum readings from the sun and a star.

Which inference can be made from the spectrum readings?

(1 point)
Responses

There is a blue shift, which means that the star is moving away from the sun.
There is a blue shift, which means that the star is moving away from the sun.

There is a blue shift, which means that the star is moving toward the sun.
There is a blue shift, which means that the star is moving toward the sun.

There is a red shift, which means that the star is moving toward the sun.
There is a red shift, which means that the star is moving toward the sun.

There is a red shift, which means that the star is moving away from the sun.

Answer 1

To accurately answer the question regarding the spectrum readings from the sun and a star, we need to clarify the concepts of redshift and blueshift.

• Blueshift occurs when the spectrum of the star shifts towards shorter wavelengths, indicating that the star is moving toward the observer (the Sun in this case).
• Redshift occurs when the spectrum shifts towards longer wavelengths, indicating that the star is moving away from the observer.

Given the response options, if the spectrum shows a blue shift, the correct inference would be: "There is a blue shift, which means that the star is moving toward the sun."

If the spectrum shows a red shift, the inference would be: "There is a red shift, which means that the star is moving away from the sun."

Without seeing the actual spectrum readings, I cannot confirm which scenario applies. However, based on the definitions, you would choose the option that correctly describes the observed shift in the star's spectrum.