Measuring wavelength on a microscopic image

Hello, I’ve only just learned of ImageJ. I will be conducting an experiment for my college course, and I’ve been informed that it may be possible to use ImageJ to measure the wavelength on images taken using an electron microscope.

I was wondering if anyone would happen to know precisely which plugins I would need to add to ImageJ in order to permit such measurements?

Thank you for any help!

I’m not sure what you’re trying to achieve. Could you please post an example image or a reference that illustrates what wavelength measurements you’re aiming at?