Significant Figures

[Angela_Kim_1N]

What is the wavelength of the radiation emitted when an electron transitions from n = 4 to n=3?
I understand how to solve this question, however how many significant figures should the answer be?

[Hirmand_Sarafian_2N]

You use the amount of significant figures in the constant you used, so you just use whatever amount of sig figs that the rydberg constant has on our chart of values.

[nikita bhat 2D]

Because the Rydberg constant has 6 significant figures given, this is how many the answer should have as well.

[Jasmine Cha 1A]

Wait, but when we use significant figures, we are supposed to take that of the number with the least significant figures, so shouldn't it just be one significant figure adapted from the n=3? Or does that just not count?

[Scott_Anderson_3J]

Wait, but when we use significant figures, we are supposed to take that of the number with the least significant figures, so shouldn't it just be one significant figure adapted from the n=3? Or does that just not count?

No, that doesn't count because the 3 isn't actually being used in the calculation. The constant is being used, therefore there are six significant figures.