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Inquiry into Physics

8th Edition
Ostdiek
ISBN: 9781337515863
Textbook Problem

. Spectral measurements of a distant galaxy show it to have a redshift z = 0.2. If the wavelength of an ionized calcium line emitted by the galaxy is 393.3 nm, what is the wavelength of this line as detected on Earth?

To determine

The observed wavelength of the line as detected on earth.

Explanation

Given info:

Wavelength emitted(λe)=393.3 nm

redshift(z)=0.2.

Formula used:

Redshift (z) is given by,

z=λoλeλe.

Calculation:

Substituting the given values, we get

0

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