## Units for HW Problem 1.23 [ENDORSED]

$c=\lambda v$

Hena Sihota 1L
Posts: 51
Joined: Fri Sep 29, 2017 7:07 am
Been upvoted: 2 times

### Units for HW Problem 1.23

For problem 1.23 I calculated the wavelength in nm, but when I went to check my answer with the solutions manual it had the answer in pm. How do I know which units to use for the final answer when calculating wavelength?

Sarah Rutzick 1L
Posts: 50
Joined: Tue Oct 10, 2017 7:13 am

### Re: Units for HW Problem 1.23  [ENDORSED]

In this problem it makes sense to convert the wavelength to picometers because one picometer is equal to 1x10^-12 meters. Since the wavelength was calculated as 8.8237x10^-12 m, 8.8237 pm expresses this wavelength in the simplest form.

lauren chung 2f
Posts: 50
Joined: Fri Sep 29, 2017 7:03 am

### Re: Units for HW Problem 1.23

If the question specifies which units to use, then you have to put your answer in that form. But if it doesn't specify, it shouldn't matter much whether you write your answer in nm or pm.