## Homework Question 1.33 (6th Ed)

$\lambda=\frac{h}{p}$

marisaimbroane1J
Posts: 69
Joined: Fri Sep 28, 2018 12:23 am

### Homework Question 1.33 (6th Ed)

For part A of this question, why do you have to use the DeBrogile Equation instead of using the kinetic energy equation to then solve for wavelength?

Chloe Orsini 1K
Posts: 32
Joined: Fri Sep 28, 2018 12:18 am

### Re: Homework Question 1.33 (6th Ed)

The Debrogile equation solves for wavelength using Planck's constant, the mass of a particle, and velocity. The velocity is given in the problem, and 9.10938356 × 10-31 kilograms is the mass of an electron (which can just be googled honestly). So you you just divide plancks constant by the velocity times the mass of he electron. You may be able to do it with kinetic energy ( I didn't try it) but using the Debrogile equation is much simpler.

Kelly Hollman
Posts: 33
Joined: Fri Sep 28, 2018 12:27 am

### Re: Homework Question 1.33 (6th Ed)

I agree, you need to use the Debroglie equation because they give you velocity.