what is red shift?
a)the shifting of an absorption to words the blue end of the
spectrum
b)the shifting of an absorption to low energy
c)the shifting of an absorption to short wave length
d)the shifting of an absorption to higer enargy.
Ans (b)
Red shift is defined as the displacement of spectral lines towards longer wavelength i.e., towards the red end.
Since, energy is inversely proportional to wavelength a higher wavelength means lower energy therefore option b is correct.
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