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I don't believe that we need to know the specific wavelengths for each radiation type, but it would be good to have a general idea about the different radiation types, especially which radiation types have longer wavelengths and which ones have shorter wavelengths.
As long as you understand the concepts of wavelengths and frequencies you should be good. ie, larger wavelength, lower frequency, lower energy and vice versa. You should also know the wavelength of the visible lights, red=700nm, violet=400nm
It'd probably be beneficial to know that a photon with a wavelength of 400-700 nm lies in the visible light spectrum, that a photon with a wavelength shorter than 400 nm is typically ultraviolet or higher energy particles (x-rays, gamma rays), and that 800 and above corresponds to infrared or lower-energy photons.
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