Question:

In photoelectric experiment energy of 2.48 eV
irradiates a photo sensitive material. The stopping
potential was measured to be 0.5 V. Work function
of the photo sensitive material is :

(1) 0.5 eV 

(2) 1.68 eV

(3) 2.48 eV 

(4) 1.98 eV

                                                                         JEE-2024

Solution:                

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