Equations for Light Only

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Megan Wong 4E
Posts: 32
Joined: Fri Sep 28, 2018 12:28 am

Equations for Light Only

Postby Megan Wong 4E » Wed Oct 24, 2018 1:02 am

Which equations from this chapter can be used for light only and which (besides the kinetic energy equation) can be used for electrons only?

Sameen Mahmood 3D
Posts: 37
Joined: Wed Jun 13, 2018 3:00 am

Re: Equations for Light Only

Postby Sameen Mahmood 3D » Wed Oct 24, 2018 9:26 am

All of the equations are given on the test and you can use all of them for everything based on the conditions given. The only restriction is De Broglie because it only applies to things with rest mass.

Sophia Ding 1B
Posts: 62
Joined: Fri Sep 28, 2018 12:16 am

Re: Equations for Light Only

Postby Sophia Ding 1B » Wed Nov 07, 2018 11:40 am

You can't use E = hv (or E = hc/wavelength for that matter) for electrons as that measures the energy for photons only. De Broglie's is what you would use to figure out wavelength for electrons given it's mass and velocity (sometimes you'll have to solve for velocity using the kinetic energy formula), but other than that I don't think there are major restrictions we need to know of.

Marwan Masri 3B
Posts: 31
Joined: Fri Sep 28, 2018 12:23 am

Re: Equations for Light Only

Postby Marwan Masri 3B » Fri Nov 09, 2018 12:36 am

You could use E=hv and E=hc/wavelength for light, but de Broglie's equation only applies to particles (even though it was derived from equations for light).

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