# Homework Help: Compton shift

1. Mar 27, 2005

### Pengwuino

I have a problem saying:

X-rays having an anergy of 300KeV undergo Compton scattering from a target. The scattered rays are detected at 37 degrees relative to the incident rays. Find the (a) Compton shift at this angle.

Now i have the angle.. but i figure i need the wavelength of the X-ray. How do i get that?

p.s. still in intro classes :D

2. Mar 27, 2005

### TimNguyen

E = h (nu)... does that look familiar?

3. Mar 27, 2005

### Pengwuino

If it was in an intro E/M course... then no lol

4. Mar 27, 2005

### TimNguyen

There's a formula equating the energy to the frequency multiplied by a constant, "h". The frequency has a really close relation to the wavelength.

5. Mar 27, 2005

### Pengwuino

So, what, Energy = plancks constant * (nu)? Whats nu?

6. Mar 27, 2005

### TimNguyen

greek letter that's used for a symbol for "frequency"

7. Mar 27, 2005

### Pengwuino

Oh, we just use f so thats cool :D

8. Mar 27, 2005

### Pengwuino

Haha gold, always nice to know my brain just shut itself off while overlooking E=hf (found it in the same chapter i was doing problems from).

9. Mar 27, 2005

### Pengwuino

Is the frequency 7.25 x 10^19?

10. Mar 27, 2005

### Pengwuino

Ok ok it looks right i hope :D. So now it asks

(b) Find the energy of the scattered x-ray

Is that the E=hf ???