## When to Use

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

CNourian2H
Posts: 106
Joined: Fri Aug 30, 2019 12:16 am

### When to Use

I know the De Brogile Equation is used in certain circumstances, what are those? How do you know based on the wording of the question that you need to use this equation for your answer?

105335337
Posts: 103
Joined: Sat Aug 24, 2019 12:15 am

### Re: When to Use

The equation is used at any time you are asked the wavelength of a particle with mass. Whether it is a baseball or neutron, both contain mass and follow the De Bregolie equation.

Kallista McCarty 1C
Posts: 212
Joined: Wed Sep 18, 2019 12:18 am

### Re: When to Use

You use De Broglie's equation when dealing with mass (pretty much anything other than light) like an electron!

Posts: 100
Joined: Wed Sep 18, 2019 12:19 am

### Re: When to Use

If the problem says something about radiation, don't use DeBroglie as this does not have a mass, but anything else including an electron has mass and you will use this formula.

Ashley Kim 3F
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

### Re: When to Use

De Broglie's equation essentially calculates the wavelength using a particle's mass and velocity, so given any one of those values (knowing that the particle has mass), you should use the De Broglie equation to solve for the unknown value.

ramiro_romero
Posts: 90
Joined: Sat Sep 07, 2019 12:16 am

### Re: When to Use

If you are relating wavelength to either mass or velocity, then you know you should use DeBroglies equation. Please keeep in mind that momentum uses Kg for mass and m/s for velocity.

Caitlin Ciardelli 3E
Posts: 44
Joined: Wed Sep 18, 2019 12:19 am

### Re: When to Use

You use de broglie to find the velocity or wavelength of something with a mass such as an electron, photon... This is why we cannot use de broglie when dealing with light because light does not have a mass.

William Francis 2E
Posts: 101
Joined: Wed Sep 18, 2019 12:20 am

### Re: When to Use

The De Broglie equation comes in handy when you need to find the wavelength of something with mass or if you are given the wavelength and required to find the values of other variables (mass or velocity).

CalvinTNguyen2D
Posts: 102
Joined: Thu Jul 25, 2019 12:16 am

### Re: When to Use

This equation is only to find the wavelength for objects with mass, velocity, and thus momentum! It will NOT work for electromagnetic radiation, so be sure to not confuse it with c = (frequency)(wavelength).