EM radiation

[A Raab 1K]

How do we know what wavelengths correspond to which types of electromagnetic radiation? Do we have to know them for the tests or will they be given to us?
For ex, when a question asks what electromagnetic radiation has a wavelength of 8.84 nm?

[Rachel Yu 1G]

I don't think we have to memorize specific values of the EM spectrum but it would be good to know the relative amounts (like x rays have a smaller wavelength than infrared, etc.)

[Natalie Nartz 4F]

I don't think we'll have to memorize the specific values. But I think memorizing the order of the types of radiation in terms of wavelength would be beneficial. I think it would also be good to memorize the range of visible light which is around 400-700nm

[kristi le 2F]

It may also be good to know the general trends of EM radiation. For example, gamma rays have short wavelength and high frequency while radio waves have long wavelength and low frequency with visible light in the middle.