Question

Calculate the wavelength, λ, in meters of a photon capable of exciting an electron in He+ from the ground state to n = 4.

Answer 1

I have used the equation RZ^2 (1/ni^2-1/nf^2)=4.113*10^7
1/4.113*10^7=2.43*10^-6 which is not correct..can someone please let me know what I did wrong? thank you

Answer 2

use the rydberg equation,

Answer 3

http://openstudy.com/study#/updates/508e8c4ae4b0bd4e826c9c1c

Answer 4

someone else posted a similar question

Answer 5

I know...thats what I used...and it s still incorrect hence I thought that my strategy might be wrong...

Answer 6

the final and initial placements are incorrect, it's (1/nf^2 - 1/ ni^2) so final minus initial

Answer 7

thank you so very much...

Answer 8

no prob!