## Problem 1.7 HW

Matthew Lee 3L
Posts: 51
Joined: Fri Sep 29, 2017 7:07 am

### Problem 1.7 HW

For problem 1.7b, it asks for the wavelength of the x-rays described using picometers (pm). I got the answer of 150 pm. However, in the back of the textbook, it says that the answer is 150 nm. Is this answer in the back a typo or am I doing something wrong?

Sara Sasaki 1K
Posts: 48
Joined: Fri Sep 29, 2017 7:05 am

### Re: Problem 1.7 HW

I think it's a typo. I solved the problem as wavelength = (c/v) = ((2.998E8 m/s)/(2.0E18 Hz)) and also got 150 pm.

Tatiana Hage 2E
Posts: 51
Joined: Thu Jul 27, 2017 3:00 am
Been upvoted: 2 times

### Re: Problem 1.7 HW

I solved the problem and got 150 pm as well, which is the answer given in the solutions manual.

Justin Chang 2K
Posts: 53
Joined: Fri Sep 29, 2017 7:04 am

### Re: Problem 1.7 HW

Yeah, I was also confused on that, but the solutions manual does indeed say 150 pm, so you should be good.

Lorie Seuylemezian-2K
Posts: 62
Joined: Fri Sep 29, 2017 7:04 am

### Re: Problem 1.7 HW

I also solved the problem and got 150 pm, I think the back of the book is a typo as the solutions manual agrees with our answer.