An astronomer claims that the universe is expanding by observing the Doppler shift in the radiation emitted by different stars around earth. If he/she is telling the truth, when we observe stars we should be able to see,

blue shift

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red shift

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both

(A)

and

(B)

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no shift

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Solution

The correct option is B red shift
If the universe is expanding, most of the stars around earth should be receding. When a star recedes to earth, the distance between them is increasing and so, we should be able to see red shift.

Hence, $(B)$ is the correct answer.

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An astronomer claims that the universe is expanding by observing the Doppler shift in the radiation emitted by different stars around earth. If he/she is telling the truth, when we observe stars we should be able to see,

The correct option is B red shiftIf the universe is expanding, most of the stars around earth should be receding. When a star recedes to earth, the distance between them is increasing and so, we should be able to see red shift. Hence, (B) is the correct answer.

The correct option is B red shift
If the universe is expanding, most of the stars around earth should be receding. When a star recedes to earth, the distance between them is increasing and so, we should be able to see red shift.

Hence, $(B)$ is the correct answer.