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Q.

In an experiment of photoelectric effect the stopping potential was measured to be V1 and V2 with incident light of wavelength λ and λ/2, respectively. The relation between V1 and V2 is :

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answer is 4.

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Detailed Solution

hcλ=W+eV1   −−−−(1)hcλ/2=W+eV2 −−−−(2)2W+2eV1  =  W+eV2   ⇒   V2=We  +  2V1                                                                                                  V2   >  2V1
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In an experiment of photoelectric effect the stopping potential was measured to be V1 and V2 with incident light of wavelength λ and λ/2, respectively. The relation between V1 and V2 is :