Which of the following types of electromagnetic radiation has the longest wavelength?

Radio waves
Ultraviolet waves
Visible light
X-rays

Question

Which of the following types of electromagnetic radiation has the longest wavelength?
 	
	Radio waves
	Ultraviolet waves
	Visible light
	X-rays

jim_thompson5910 · Answer

This might help https://upload.wikimedia.org/wikipedia/commons/thumb/c/cf/EM_Spectrum_Properties_edit.svg/2000px-EM_Spectrum_Properties_edit.svg.png

spring98 · Answer

I know but i don't know how to do it thats why i asked for help @jim_thompson5910

jim_thompson5910 · Answer

stuff on the very right has a short wave length

the stuff on the very left has a longer wave length

example: gamma rays have the shortest wave length (since it's 10^(-12) meters) while x rays have slightly longer wavelengths because they are to the left of gamma rays

jim_thompson5910 · Answer

btw Idk why but my notifications aren't working, so I didn't get that tag mention for some reason

michele_laino · Answer

longest wavelength $\lambda$ is associated with a littlest frequency $\nu$, due to this relationship:
$\lambda \nu=c$
where $c $ is the speed of the electromagnetic waves in vacuum.
Furthermore, from the spectrum of the electromagnetic wave, we can see that onde radio have the longest wavelength among the radiations you provided

michele_laino · Answer

oops.. onde radio is in italian, I meant Radio waves

spring98 · Answer

Thank you very much!!!