## When using the constant C

$c=\lambda v$

Davalanya 1F
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### When using the constant C

i know today in lecture that Professor Lavelle defined c as 3.00*10^8 however in the book its 2.99* 10^8 and I was wondering if this mattered during tests if we used either one of them.

Paul Wong1B
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### Re: When using the constant C

Dr. Lavelle said that he rounded the value of the speed of light (c) to 3.00x10^8 in his lecture slide, so I would assume that it would be okay to use the value.

Chem_Mod
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### Re: When using the constant C

In tests use the equation and formula sheet that is provided.
As I announced in class they are given in all tests and exams and everyone is using the same numbers to arrive at the same answer.

As I commented in class I used the rounded value for the speed of light in vacuum.

The speed of light in vacuum, c, is 299,792,458 metres per second (approximately 3.00 × 10⁸ m/s).