## Value for C

$c=\lambda v$

Mallika Chimpiri 3K
Posts: 58
Joined: Thu Jul 25, 2019 12:17 am

### Value for C

What value is recommended we use for the c constant during calculations? 2.998e8 or 3.00e8?

ThomasNguyen_Dis1H
Posts: 102
Joined: Fri Aug 30, 2019 12:17 am

### Re: Value for C

You can use either one. I like using 3x10^8 since its easier on my calculator. Either way .002 wouldn’t make a difference in your final answer.

Chris Tai 1B
Posts: 102
Joined: Sat Aug 24, 2019 12:16 am

### Re: Value for C

Typically in calculations, it should be alright to use 3.00x10^8 in place for the speed of light. This definitely depends on how precise you want your result to be.

Julianna Laurentano 4G
Posts: 52
Joined: Wed Sep 18, 2019 12:21 am

### Re: Value for C

During my discussions we have been using 3.00x10^8, but as long as your final answer is rounded to the correct number of significant figures I'm sure either is fine to use!

Eugene Chung 3F
Posts: 142
Joined: Wed Nov 15, 2017 3:03 am

### Re: Value for C

During test, they will give you all the constants you need in the front page. I would try to use the ones that are given by the class on the front page.

Rosa Munoz 2E
Posts: 105
Joined: Wed Sep 18, 2019 12:21 am

### Re: Value for C

I usually use 3.0x10^8.

Betania Hernandez 2E
Posts: 107
Joined: Fri Aug 02, 2019 12:15 am

### Re: Value for C

Either one would be fine but on tests you should use the one given on the equations and constant sheet in order to be precise as possible.

Kevin Liu 1J
Posts: 53
Joined: Thu Jul 25, 2019 12:16 am

### Re: Value for C

Usually, I just use 2.998 x 10^8 to improve accuracy and just round off for significant figures only after the final calculation.

Donna Nguyen 2L
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

### Re: Value for C

I think either is fine to use, but I would recommend using the one on the constants and equations sheet just in case.