Question

Given the following data

Bright side
Color	Frequency	Stopping voltage (in V)
Yellow	5.19 x 1014	0.79
Green	5.49 x 1014	0.90
Blue	6.88 x 1014	1.51
Blue/Violet	7.41 x 1014	1.66
Dark violet	8.21 x 1014	1.90

1. Determine the threshold frequency for this apparatus. What is the associated threshold wavelength (the longest wavelength which releases electrons from the apparatus)? Quote your result with uncertainty. (You may need to review the rules for propagating uncertainty (I know how to do the uncertainty, its just the threshold wavelength from the data ,thanks :) )

Answer 1