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Threshold wavelength of certain metal is...

Threshold wavelength of certain metal is `lamda_0` A radiation of wavelength `lamdaltlamda_0` is incident on the plate. Then, choose the correct statement from the following.

A

Initially, electrons will come out from the plate.

B

The ejected electrons experience retarding force due to development of positive charges on the plate.

C

After some time, ejection of electrons stop.

D

None of the above

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For photoemission `lambda lt lambda_(0)`
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