Light emission ranges

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Catherine Lowe 1B
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Joined: Fri Sep 25, 2015 3:00 am

Light emission ranges

Postby Catherine Lowe 1B » Sun Nov 01, 2015 10:41 pm

What are the ranges of the frequency and wavelengths for a certain electron emitted (for example visible light, infrared, ultraviolet, etc.)?

Austin Qiu 1A
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Joined: Fri Sep 25, 2015 3:00 am

Re: Light emission ranges

Postby Austin Qiu 1A » Mon Nov 02, 2015 11:18 am

From the many scenarios that I've seen, an emitted electron from a metallic surface by a photon with energy E will have a de Broglie wavelength of appoximately 1 nm or less (frequency is about 10^18 Hz), which is in the X-ray region.

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Re: Light emission ranges

Postby Chem_Mod » Mon Nov 02, 2015 7:00 pm

It all depends on the energy that the initial photon/the kinetic energy of the electron. There is not necessarily a defined range. However, going through homework problems and examples from previous exams should give you an idea of the types of values that you will typically see.

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Re: Light emission ranges

Postby 304579397 » Sun Nov 29, 2015 4:39 pm

It is easier to remember that the visible range is 400-800 nm and anything below is ultraviolet and anything above is infrared.

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