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3 years ago

How has the Doppler effect and the redshift of stars and galaxies indicated that the universe is expanding?

Biology

2 answers:

kiruha [24]3 years ago

4 0

Answer:

The effect of red shifting in wavelength is continuously increasing which depicts the expansion of universe.

Explanation:

In Doppler shift there occurs an apparent change in the wavelength of the light emitted by star

For example – If a star is near to earth, the light emitted by it would be shorter in wavelength while a star far away from earth will emit a light that has a longer wavelength.

Thus a shorter wavelength light is shifted towards the end of spectrum which is blue while a longer wavelength light shifts towards the red end of spectrum (known as redshift)

The farther the star from earth , the more it is red shifted . The red shift effect is continuously increasing.

Hence, both Doppler and redshift affect depicts that universe is continuously expanding.

sertanlavr [38]3 years ago

3 0

The could tell by solar radiation and dark matter, they didnt know were dark matter was but they new it was there

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Answer:

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