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Problem 1.7 conversion of meters to nanometers

Posted: Wed Oct 17, 2018 9:35 pm
by Linda Arroyo 3J
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

Re: Problem 1.7 conversion of meters to nanometers

Posted: Wed Oct 17, 2018 9:46 pm
by RachaelKoh3A
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!

Re: Problem 1.7 conversion of meters to nanometers

Posted: Wed Oct 17, 2018 9:54 pm
by 804991762_4A
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)