(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A radar trap operates at a frequency of f = 10GHz. The speed of microwaves is 3.0x10^8m/s. The microwave beam is aimed at a car approaching at 20m/s.

a) calculate difference between observed frequency and original frequency.

b) the car becomes the moving source at frequency, fo. calculate the frequency difference between the reflected signal and fs.

2. Relevant equations

for part a, we have a fixed source and a moving observer. the equation for this is fo = fs(1 + vo/v)

for part b, the equation is fo = fs (v/v-vs), but i'm not sure what's v and vs. is v the speed of the radar? or the car?

3. The attempt at a solution

for part b, i need to look for the observed frequency of the car(moving source).

can someone clarify the speeds please?

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# Homework Help: Doppler's effect

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