Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of universe? 1) Detection of microwaves in space 2) Observation of redshift phenomenon in space 3) Movement of asteroids in space 4) Occurrence of supernova explosions in space Select the correct answer using the codes given below:

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CollectorBabu · Accepted Answer

Correct Answer: 1 and 2. It is noted that Redshifts in spectral lines of distant stars initially was observed in 1926 attributed as phenomenon to expansion of universe, so statement 2 is correct. In 1963, while working on satellite designed two scientists realised microwaves which they tested through satellite's antenna and found mysterious microwaves, so statement 1 is correct. Statement 4 is incorrect as supernova explosions helped astronomers to find distance of galaxy and redshift of it, hence correct option is A..

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