[Ritik]

 Light of prominent mercury line 2357 A ejects from a metal surface, electrons that have stopping potential of 2.4 volts. The stopping potential of electrons ejected from the same metal by the other prominent mercury line 1849 A is 4.04 volts. calculate the value of Planck's constant.

[billnotgatez]

@Ritik
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[Ritik]

@billnotgatez, I am sorry I didnt mention my attempt at the solution. Will keep this in my mind from now on!
Here's what I did:
λ1=2357 A, λ2=1849 A, Φ=  work function

hc/λ1= 2.6 + Φ
hc/λ2= 4.04 + Φ
Are these both equations correct? I will need to change the wavelength to metres, but do I need to convert the value of the stopping potential, which are given in Joules?