Electromagnetic Spectrum

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Electromagnetic Spectrum

Postby tonyhu » Thu Oct 10, 2019 9:22 pm

For the course, do we need to memorize the wavelenghts of different waves like visible light?

Eugene Chung 3F
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Joined: Wed Nov 15, 2017 3:03 am

Re: Electromagnetic Spectrum

Postby Eugene Chung 3F » Thu Oct 10, 2019 10:29 pm

It does not mention that in the class website "Learning outcome; Outline 2: The Quantum World" pdf, but some HW questions requires that knowledge.

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Re: Electromagnetic Spectrum

Postby sarahwu3a » Fri Oct 11, 2019 3:52 am

I don't think you need to memorize all the wavelengths for light but knowing that visible is about 400-700nm is definitely going to be necessary!

Erik Buetow 1F
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Joined: Fri Aug 30, 2019 12:15 am

Re: Electromagnetic Spectrum

Postby Erik Buetow 1F » Fri Oct 11, 2019 9:05 am

I don't know for sure, but I feel like it would be helpful to know both the lyman series (UV) and the balmer series (visible) and their corresponding energy levels and wavelengths.

Julia Mazzucato 4D
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Joined: Fri Aug 30, 2019 12:17 am

Re: Electromagnetic Spectrum

Postby Julia Mazzucato 4D » Fri Oct 11, 2019 10:35 am

It'll probably be useful, especially with problems from photoelectric effect/atomic spectra lessons.
Here's a breakdown by wavelength from smallest wavelengths (highest frequency) to largest wavelength:

Gamma rays, <0.01 nm
X-rays, 0.01 nm - 10 nm
Ultraviolet, 10 nm - 400 nm
Visible Light, 400 nm - 700 nm
Infrared, 700 nm - 1 mm
Microwaves, 1 mm - 30 mm
Radiowaves, >30 mm

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