Question

It is believed that the universe is expanding and hence the distant stars are receding from us. Light from such a star will show
(a) Shift in frequency towards longer wavelengths(b) Shift in frequency towards shorter wavelength(c) No shift in frequency but a decrease in intensity(d) A shift in frequency sometimes towards longer and sometimes towards shorter wavelengths

Answer 1

The answer is (C) No shift in frequency but a decrease in intensity.

Star with the expanding universe are going distance from us.
The light emitted from them is still the same though (excluding the age fact that they have to die)
Thus, one can conclude to the above answer.