Speed of light value

[Brenda Tran 3C]

Hi!
For the speed of light, should we use 3 x 10^8 m/s or be more precise and use 2.998 x 10^8 because I know that in lectures we use 3 x 10^8 m/s but in the textbook they used the other value.

[Amanda Pineda 3H]

Hi! I would say to use the 3.00 x 10^8 because this is the value that we've used in the lecture worked example problems and since our professor uses this value, it's probably the safest bet for quizzes and tests! I think the most important thing to worry about is sig figs in the final answer since either number will likely give you the same answer! Hope this helps

[Michelle Jeong 1B]

Hi! I agree with Amanda, I think 3 x 10^8 m/s is good. Also since this is a constant I do not think sig figs are relevent becasue constants are considered to be infinitely precise.

[HaleyC 2F]

It is 3.00 x 10^8 m/s.

[Niyati 1F]

Since it is a constant, the sig figs will not be based on this value so 3 x 10^8 is sufficient.

[Mekenna Faulkner]

I agree that using 3x10^8 should be sufficient due to the usage of significant figures. This is also a given constant value so if there would be a difference, it likely would always be given as 2.998.

[Joseph Ettipio]

According to the equation sheet that we will be able to use on the midterm, it is 2.99792 x 10^8 m/s, but 3.00 x 10^8 m/s should suffice in most cases.

[Ivan Huang Dis 3B]

it would be more accurate to use 2.99x10^8 but 3x10^8 should be accurate enough for tests.

[Ryan Lafferty 1L]

In lecture Professor Lavelle used 3.00 x 10^8 m/s, so I believe we are able to use this value for our achieve homework and other worked examples.

[Lulu Almoshawah_2K]

We used 3.00 x 10^8 m/s in lectures, so I would say use that

[Trisha Badjatia 2L]

Yes, like what the other folks have said, the actual value is something close to it is 2.99792 x 10^8 m/s. However, we rarely have numbers that have that many sig figs so using 3.00 x 10^8 m/s is fine.

[Nithya Madhu 2L]

Hey,
I also agree with others and say to use 3.00 x 10^8 since that is the value we have been using in class.

[Aaron Kim 1J]

Even though it'd be more accurate to use 2.99x10^8, 3x10^8 should be accurate enough for tests, quizzes, and assignments. Also note that one of Achieve's features allows any number between an inputted range of numbers to be marked correct as an answer, which tells us that grading probably won't be too pedantic.

[805601733]

Hi! I had the same question at first too. Someone in the GroupMe said that their TA said 3 x 10^8 is fine.

[Abby 2B]

Hi! I would also agree to use 3.00 X 10^8 since that is what the professor has been using.

[505807269]

Hi, I would tend to use 3.0 x 10^8 because while doing long calculations, it would not really make a huge difference. Also we will end up rounding up to the correct number of significant figures anyways.

[Emily2J]

We always use 3.00 x 10^8 m/s in lectures, so I would imagine the tests would be the same

[305824279]

Even though the correct value is about 2.99x10^8 m/s, i believe that we are expected to use 3.00x10^8 m/s because that was the value used during lecture and it is also simpler.

[Ameen Shaheen 2I]

Hi!

Yea we use the 3 x 10^8 m/s in calculations according to the hw set and problems we've been given.

[Clayton Dinh 3C]

I think 3 x 10^8 should be accurate enough to use

[Violet Mbela 2B]

Hello,
I think the rounded 3.0 would work just fine, but even if you felt the need to use the other value, I think that since the midterm is multiple choice, whether you rounded or not you would be able to see your answer within the bank.

[Rishab_Haldar_3B]

I think 3.00*10^8 is fine as the professor has been using this value as the speed of light in lecture.

[Anubhav_Chandla1G]

Using speed of light (c) is 3.00 * 10^8 is fine.

[QUEP 2F]

Hi!

I'd say using c = 3.00 x 10^8 m/s is fine since it's the value we've used for worked examples in lecture.

[Kati Rady-Pentek 1E]

I would use 3 x 10^8 m/s because that is the value on the constants and equations sheet provided to us

[Chris Van 2J]

3.00 * 10^8 m/s is usually the most common value to use, however, if it gives you the value for the speed of light in an equation, I would go with that!

[Anish_Marripati_2F]

For exams, I would use 2.998*10^8, but on calculations for homework or practice problems, I would more likely use 3.00*10^8.