The term ‘Blue Shift’ is used to indicate?

A. Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object.Correct Answer

B. Turning a star from white to blue

C. In future sun would become blue

D. Black hole was blue at its start

E. None of these

Correct Option: A. Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object.

Detailed Explanation & Reference:

A. Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object.

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