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A certain metallic surface is illuminated by monochromatic rad
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A certain metallic surface is illuminated by monochromatic radiation of wavelength . The stopping potential for photoelectric current for this radiation is . If the same surface is illuminated with a radiation of wavelength , the stopping potential is , The threshold wavelength of this surface for photoelectric effect is _______ .

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Updated on: Dec 17, 2022

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JEE Mains 2021 July 20 Shift 2

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A certain metallic surface is illuminated by monochromatic radiation of wavelength . The stopping potential for photoelectric current for this radiation is . If the same surface is illuminated with a radiation of wavelength , the stopping potential is , The threshold wavelength of this surface for photoelectric effect is _______ .
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For first case ; ......(1)

For second case; ......(2)

From equation (i) and (ii)



For

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Question Text
A certain metallic surface is illuminated by monochromatic radiation of wavelength . The stopping potential for photoelectric current for this radiation is . If the same surface is illuminated with a radiation of wavelength , the stopping potential is , The threshold wavelength of this surface for photoelectric effect is _______ .
Updated OnDec 17, 2022
TopicDual Nature of Radiation and Matter
SubjectPhysics
ClassClass 12
Answer TypeText solution:1 Video solution: 3
Upvotes467
Avg. Video Duration5 min