## Chapter 1 Problem 7b

$c=\lambda v$

Lucian1F
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### Chapter 1 Problem 7b

"When an electron beam strikes a block of copper, x-rays with a frequency of 2.0 x 10^18 Hz are emitted. What is the wavelength (in picometers) of these x-rays?" I got an answer of 150 pm but the back of the book says 150 nm. I'm pretty sure this is just a typo, especially since the question explicitly states to answer in picometers but the answer given is in nanometers, so I was just wondering if anyone can confirm if this is indeed a typo?

Chem_Mod
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### Re: Chapter 1 Problem 7b

Yes, you are correct. It should be 150 pm. The solutions manual has it corrected.

Lucian1F
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### Re: Chapter 1 Problem 7b

Alright, thank you!

Mishta Stanislaus 1H
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### Re: Chapter 1 Problem 7b

I had the same question, thanks for clarifying!