Planck's Constant

[Adrienne_4F]

When we're using Planck's constant, do we use 6.626 X 10^-34 or 6.63 X 10^-34? Professor switches off between the two in the lecture notes.

[Kate Chow 4H]

It doesn't matter because the only difference between 6.626 X 10^-34 and 6.63 X 10^-34 is the number of significant figures. I would use 6.626 X 10^-34, as more significant figures will usually lead to a more accurate answer in the end.

[Tyra Nguyen 4H]

The only part where significant figures matter is the answer.

[Jeremy_Guiman2E]

I believe he uses 6.63 X 10^-34 when there are only a maximum of three significant figures are given. Otherwise, if given four or more, he will use 6.626 X 10^-34.

Regardless, I would agree though that using 6.626 X 10^-34 consistently will give the most accurate results.

[Nina Do 4L]

In peer learning sessions, we use 6.626*10^-34.