# Homework Help: Doppler Shift as Applied to Nuclear Structure and Spectroscopy

1. Apr 27, 2012

### atomicpedals

1. The problem statement, all variables and given/known data

a) Calculate the Doppler shift due to a relative velocity of 3cm/sec.
b) Fine $\Delta E/E$, where $E = 14.4keV$ and $\Delta E$ is the Doppler shift obtained in (a).

2. Relevant equations

$\frac{f_{0}}{f_{s}}=\frac{c}{c+v_{s}}$

3. The attempt at a solution

So I'm working on the assumption that the non-relativistic Doppler equation I showed above is appropriate (3cm/sec is certainly non-relativistic). So following that I arrive at a Doppler shift of 440Hz. Which would be ~1.8E-12eV assuming $E=fh$. Which makes part (b) 1.25E-16eV. Something seems wrong with my reasoning, but I have no idea what. Have I barked up the wrong tree!?!