Question

Question 25 of 25
How do changes in light wavelengths support the most widely accepted
ideas about the universe?
O A. Galaxies are moving away from Earth, as shown by the shift of
their light toward the red end of the spectrum.
B. Galaxies are moving toward Earth, as shown by the shift of their
light toward the blue end of the spectrum.
OC. Galaxies are moving away from Earth, as shown by the shift of
their light toward the blue end of the spectrum.
OD. Galaxies are moving toward Earth, as shown by the shift of their
light toward the red end of the spectrum.

Answer 1

The changes in light wavelengths support the most widely accepted

ideas about the universe is Light from other galaxies shifts toward the red end of the spectrum, which shows that the galaxies are moving away from Earth. The correct option is A.

What is universe?

Universe is the whole cosmic system of matter and energy. The Earth, the Sun, the Moon, the planets, the stars along with the ,dust , gases, rocks forms the universe.

As the universe is expanding more and more, the galaxies are shifting their way apart.

According to  Doppler's Effect, wavelength and frequency of a wave will changes with respect to an observer If the observer moves closer, the spectrum will shift towards blue end and if it moves away, the spectrum will shift towards the red end.

When spectrums of distant galaxies were observed to be shifting towards red light,  also known as Red shifting. This shows that the Big Bang theory is true that universe is expanding.

Thus, the correct option is A.

Learn more about universe.

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