A certain metallic surface is illuminated with monochromatic light of wavelength, . The stopping potential for photoelectric current for this light is . If the same surface is illuminated with light of wavelength , the stopping potential is . The threshol

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Solution

Q.
A certain metallic surface is illuminated with monochromatic light of wavelength, $λ$ . The stopping potential for photoelectric current for this light is $3 V_{0}$ . If the same surface is illuminated with light of wavelength $2 λ$ , the stopping potential is $V_{0}$ . The threshold wavelength for this surface for photoelectric effect is [2015]

1 $\frac{λ}{4}$

2 $\frac{λ}{6}$

3 $6 λ$

4 $4 λ$

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