From laboratory measurements, we know that a particular spectral line is formed by the rotation of the carbon monoxide molecule (co) and it appears at a wavelength of 2.6007 millimeters (mm). the spectrum of an interstellar cloud of gas shows the same co line appearing at a wavelength of 2.6008 mm. what can we conclude about the gas cloud?

hange in value is because the observer and the  source has a relatively high speed

Explanation:

The emission of a molecular with is always the same, the reason why they change in value is because the observer and the source has a relatively high speed.

As the energy of the beam varies inversely with the wavelength, this shift is due to the fact that the earth and the cloud are moving away from each other.

If we want to find the velocity eta value we must use the relativistic Doppler effect

      f ’= fs √ [(1- v / c) / (1 + v / c)]

it would be kevlar ^^