### Speed of light wavelength equation

Posted:

**Sat Dec 09, 2017 2:50 pm**When do you use the c = wavelength x frequency?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=14&t=24957

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Posted: **Sat Dec 09, 2017 2:50 pm**

When do you use the c = wavelength x frequency?

Posted: **Sat Dec 09, 2017 2:57 pm**

since the value of c is constant, being the speed of light, you can use the equation to solve for either wavelength of frequency, depending on what the given values are

Posted: **Sat Dec 09, 2017 2:59 pm**

Sometimes you might also need to rearrange and plug this formula into a larger question/different formula. For example, you might rewrite E=hv to E=hc/lambda.

Posted: **Mon Apr 09, 2018 1:57 pm**

Most commonly I think we have been using the equation in the form wavelength= c (3.0 x 10^8)/ frequency to solve for the wavelength. I feel like that is the most common form of the equation that we have seen.

Posted: **Mon Apr 09, 2018 10:22 pm**

Since the value of c is a constant should we memorize it for exams or will the its value be provided during?