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The Electromagnetic spectrum

Posted: Sun Apr 15, 2018 9:42 pm
by Leslie Contreras 1D
Do we have to memorize the spectrum if not how do we calculate its energy in order?

Re: The Electromagnetic spectrum

Posted: Sun Apr 15, 2018 9:52 pm
by KC Navarro_1H
I don't think we'd have to memorize the electromagnetic spectrum if it were on a test and we have to put them in order, but if we had to calculate the energy of a particle, I think you'd use E = hv.

Re: The Electromagnetic spectrum

Posted: Sun Apr 15, 2018 9:54 pm
by 704992521
I think that the spectrum would be provided or at least the specific location of a light on the spectrum would be given if needed to answer a question.

Re: The Electromagnetic spectrum

Posted: Sun Apr 15, 2018 9:57 pm
by Jimmy lira-1G
Do we have to memorize the spectrum if not how do we calculate its energy in order?

I'm not really sure we have to memorize the spectrum, but I feel it would be very helpful.
To answer your question, to calculate the energy first use (c = λ × ν), then after finding the frequency use Plank's equation to calculate energy of the light ( E = hf). Then by doing so you can place them in order.
Hope this was helpful !
-Jimmy Lira - 1G

Re: The Electromagnetic spectrum

Posted: Sun Apr 15, 2018 10:09 pm
by jadam_1E
I don't think that memorization, in terms of the exact range of wavelength for every type of electromagnetic radiation, will be needed. However, It will be good to know things like: red visible light has a longer wavelength than blue and violet visible light, ultraviolet light, x rays and gamma rays have more energy and shorter wavelengths than visible light (which is why they are all dangerous and we don't want to be exposed to them; shoutouts to the o-zone for blocking majority of UV rays).

Re: The Electromagnetic spectrum

Posted: Sun Apr 15, 2018 10:27 pm
by Chem_Mod
You should familiarize yourself with the order of the radiation. It would also be beneficial to become familiarizing yourself with the approximate numbers (in nm) for the more common electromagnetic waves (visible, UV, infrared) as these are used experimentally in chemistry very often.