When a certain photosensitive surface is illuminated with monochromatic light of frequency \upsilon, the stopping potential for the photo current is -v_0/2. When the surface is illuminated by monochromatic light of frequency \upsilon/2, the stopping potential is -V_0. The threshold frequency for photoelectric emission is

NEET 2020 Model Question Paper 3

Question : 44 of 180

Marks: +1, -0

When a certain photosensitive surface is illuminated with monochromatic light of frequency υ, the stopping potential for the photo current is −

. When the surface is illuminated by monochromatic light of frequency

, the stopping potential is −V0. The threshold frequency for photoelectric emission is

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