Problem 9) If you had light of wavelength 700nm when emitted, what would the wavelength be for an observer who is a red shift z = 0.05 from that source?

The answer is 735 Nanometer

Explanation:

Solution to this problem

Given that:

Solution)

The Redshift is categorized by the  difference related between  wavelength(emitted)  and wavelength (observer).

Now,

The wavelength can be computed as  :

1+z=\lambda (observer)\div \lambda (emitted)

hence,

1 + 0.05 = λ(observer) / 700 nm

Gives

= 1.05*700  = 735 nm

Therefore, The wavelength from that source for an observer would be 735 nanometer