## Problem 1.7 conversion of meters to nanometers

$c=\lambda v$

Linda Arroyo 3J
Posts: 15
Joined: Fri Apr 06, 2018 11:01 am

### Problem 1.7 conversion of meters to nanometers

So on problem 1.7, I'm confused on how they converted the final answer of 4.2x10^-7 to 420 nm. because nm is 10-9 . can someone please help. thank you

RachaelKoh3A
Posts: 33
Joined: Fri Sep 28, 2018 12:25 am

### Re: Problem 1.7 conversion of meters to nanometers

1 m = 1 x 10^9 nm and conversely 1 nm = 1 x 10^-9 m.

So, 4.2 x 10^-7 m converted to nm will be 4.2 x 10^-7 x 10^9 nm which is just 420 nm after the powers cancel out.

Hope this helps!

804991762_4A
Posts: 47
Joined: Fri Apr 06, 2018 11:04 am

### Re: Problem 1.7 conversion of meters to nanometers

If you want to convert meters to nanometers all you have to do is take the given meter and multiply it by 1nm/10^-9 m, so that way you can cancel out the meters and are left over with nanometers.
Example:
(7.10 x 10^-7 m) x (1nm/10^-9m)