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Topic: de Broglie equation.....what are the units?  (Read 18322 times)

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Offline StillLearning

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de Broglie equation.....what are the units?
« on: October 27, 2008, 10:55:02 PM »
The de Broglie equation:

lambda=h/mv

What are the units for mass?  Grams?  Kilograms?  Why on earth doesnt my book say anything about this??
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Offline StillLearning

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Re: de Broglie equation.....what are the units?
« Reply #1 on: October 27, 2008, 11:26:56 PM »
It seems to be in kg. 
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Offline Borek

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Re: de Broglie equation.....what are the units?
« Reply #2 on: October 28, 2008, 03:59:49 AM »
It doesn't matter what units you use as long as you use them consistently - so the same mass unit used for mass and for h.

h is usually given in J*s, which means mass in kg and length in m.
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