When a centimeter thick surface is illuminated with light of wavelength `lamda`, the stopping potential is V. When the same surface is illuminated by light of wavelength `2lamda`, the stopping potential is `(V)/(3)`. Threshold wavelength for the metallic surface is
A
`(4 lambda )/(3)`
B
` 4 lambda `
C
` 6 lambda `
D
`(8 lambda )/(3)`
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The correct Answer is:
B
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