## de broglies equation

705379941
Posts: 52
Joined: Fri Aug 30, 2019 12:16 am

### de broglies equation

when do we use de broglies equation?

Karyn How 1J
Posts: 50
Joined: Thu Jul 25, 2019 12:16 am

### Re: de broglies equation

De Broglie's equation is used to determine the wavelength of moving particles with momentum. It allows you to determine if the object has noticeable wavelike properties.

DHavo_1E
Posts: 118
Joined: Sat Aug 17, 2019 12:17 am

### Re: de broglies equation

705379941 wrote:when do we use de broglies equation?

Hello,

You can use it for any real particles with a rest mass, or any particle with momentum and has wavelike properties with a wavelength. You cannot apply it for light.

Wilson 2E
Posts: 100
Joined: Sat Aug 17, 2019 12:18 am

### Re: de broglies equation

De Broglie's equation (wavelength = h/p) is calculated using both Planck's constant (h) and momentum (p) to determine wavelength. Momentum equals mass times velocity (p=mv), therefore you can extend the equation to [wavelength = h/(mv)]. With this is mind, De Broglie's equation should be used if a questions asks for wavelength and provides velocity and mass, or vice versa if wavelength is provided along with either mass or velocity to calculate the remaining variable.

Maya Gollamudi 1G
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

### Re: de broglies equation

De Broglie's equation (wavelength = h/p) shows the relationship between wavelength and momentum (mass x velocity). The equation can be used to calculate the wavelength of a particle that is small enough to have wavelike properties. The wavelength will also be more dependent on the mass of the particle than the velocity.

Jessica Tejero 3L
Posts: 54
Joined: Wed Sep 25, 2019 12:16 am

### Re: de broglies equation

Also if their is massless particles like photons, I believe we can use c=λν or E=hν. And I think the formula c=λν can be used for objects with a mass you just have to replace the speed of light (c), with velocity

Brittney Hun 2C
Posts: 104
Joined: Wed Sep 11, 2019 12:15 am

### Re: de broglies equation

De Broglie's equation is used to determine if matter has wavelength properties, but it is only noticed for moving objects with momentum (p) and objects with extremely small mass. The wavelength can be measured using this equation, where mass determines the outcome. Make sure that these calculations do not translate to frequency or the electromagnetic scales. If the wavelength is less than 10^-5 meters then it does NOT have detectable wavelength properties.