JEE Advanced 2016 Paper 2 Physics Q8

Physics · Dual Nature of Radiation & Matter

Problem

Light of wavelength λph\lambda_{\rm ph} falls on a cathode plate inside a vacuum tube as shown in the figure. The work function of the cathode surface is ϕ\phi and the anode is a wire mesh of conducting material kept at a distance dd from the cathode. A potential difference VV is maintained between the electrodes. If the minimum de Broglie wavelength of the electrons passing through the anode is λe\lambda_e, which of the following statement(s) is(are) true?

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