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**The velocity of electrons!! (question)**

Can someone tell me if I'm right? I used this walkthrough I found to get my answer but I used a different wavelength for my experiment. Here's the link:

http://wiki.answers.com/Q/What_is_th...ength_of_235nm

I did the same thing except I used a wavelength of 400 nm and my answer was 2038 m/s. This is one of my first problems with this and I was just curious if anyone could comfirn this answer or if I failed horribly.

Thanks.