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When zinc is irradiated by radiation of ...

When zinc is irradiated by radiation of `lambda = 3100 A^@`, photoelectrons are being emitted. To increase the kinetic Energy of the ejected photoelectrons

A

the wavelength of incident radiation has to be increased

B

the wavelengh of incident radiation has to be decreased

C

the intensity of the incident radiation has to be decreased

D

the intensity of the incident radiation has to be increased.

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