When a certain photosensitive material is illuminated by monochromatic light of frequency f, the stopping potential for the photocurrent is v / 2. When the surface is illuminated by the monochromatic light of frequency f / 2 the stopping potential is v. The threshold frequency for the photoelectric emission is?
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When a certain photosensitive surface is illuminated with monochromatic light of frequency v, the stopping potential for the photocurrent is V02.
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