## Homework #1.7 [ENDORSED]

$c=\lambda v$

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

### Homework #1.7

In question 1.7 in the textbook at asks, to calculate the wavelength.
My answer was 1.49x10^-10, but the correct answer is 1.5x10^10. Does anyone know if we have to round up, or can we leave it just like that?

Bryan Jiang 1F
Posts: 37
Joined: Fri Apr 06, 2018 11:03 am
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### Re: Homework #1.7  [ENDORSED]

This is more of a question with sigfigs. Since we have not formally talked about sigfigs in lecture, I do not think the rounding matters for now. Also, be careful of the negative signs in your exponents!

Alejandro Salazar 1D
Posts: 31
Joined: Fri Sep 29, 2017 7:05 am

### Re: Homework #1.7

2.0 and 7.1 both have two sig figs. Usually you determine the number of sig figs based on the given numbers. It is based on the lowest number of sig figs