Posted by Dana on Monday, April 7, 2008 at 5:58pm.
An electron strikes the back of a TV screen at 1/10 the speed of light.
What is the speed of the electron?
What is the momentum of the electron?
What is the deBrogile wavelength of the electron?

Physics  drwls, Monday, April 7, 2008 at 6:52pm
v = 0.1 c = ?
momentum = m*v = ?
de Broglie wavelength = h/{momentum) = ?
You do the numbers. You will need to look up the speed of light (c), electrom mass (m), and Planck's constant (h).
I am using nonrelativistic (before Einstein) formulas. The correct formulas will differ by a factor of sqrt [1  (v/c)^2]= 0.995

Physics  maahy, Tuesday, April 26, 2016 at 9:28pm
Consider the de Broglie wavelength of an electron that strikes the back face of one of the early models of a TV screen at 1/10 the speed of light
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