Which of the following is /are cited by the scientists as evidence/evidences for the continued expansion of the universe? 1. Detection of microwaves in space 2. Observation of the redshift phenomenon in space 3. Movement of asteroids in space 4. The occurrence of supernova explosions in space

QUESTION

Hard

Science & Technology

Prelims 2012

Which of the following is /are cited by the scientists as evidence/evidences for the continued expansion of the universe?

Detection of microwaves in space
Observation of the redshift phenomenon in space
Movement of asteroids in space
The occurrence of supernova explosions in space

Select an option to attempt

Explanation

The key evidence cited by scientists for the continued expansion of the universe is the observation of the redshift phenomenon in light from distant galaxies.

As the universe expands, the wavelengths of light from these galaxies are stretched, resulting in a shift towards longer, redder wavelengths - the redshift phenomenon. This redshift is considered a strong piece of evidence supporting the expansion of the universe, as predicted by the models of cosmology.

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