February 28, 2017

Homework Help: Physics

Posted by Hannah on Thursday, April 22, 2010 at 10:20am.

In which region of the electromagnetic spectrum do we find the energy to fully ionize hydrogen?

A) Radio
B) Infrared
C) Visible
D) Ultra-violet
E) X-ray

I want to know how you would go about doing this question; I know we need to find the wavelength, but what exactly is the connection between wavelength and energy required?

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