De Broglie Equation
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De Broglie Equation
Would anyone be able to explain/go through the derivation of the De Broglie equation? I know we don't necessarily need to know it but it would help my understanding.
Re: De Broglie Equation
We will start with two fundamental equations
and 
Next, we will set these equations equal to each other giving us

From there you can substitute c (speed of light) for v, because the De Broglie Equation applies to all matter. Finally, convert mv to p, because momentum is defined as
mass x velocity, and solve for h.
Next, we will set these equations equal to each other giving us
From there you can substitute c (speed of light) for v, because the De Broglie Equation applies to all matter. Finally, convert mv to p, because momentum is defined as
mass x velocity, and solve for h.
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- Joined: Fri Sep 29, 2017 7:04 am
Re: De Broglie Equation
When do we use 1/2mv2 for Ek and when do we use de broglies equation for Ek?
Re: De Broglie Equation
De Broglie's equation relates wavelength with mass and velocity, not energy. Ek is defined by
. If you're asking when do we use which when given velocity, then that depends on what you're given and whether you're trying to find wavelength or kinetic energy.
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