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The threshodld wavelength for photoelect...

The threshodld wavelength for photoelectric emission from a metal is `5000 A^@`. Photoelectrons shall be emitted when the metal is illuminated by monochromatic radiation of wavelength

A

`lambda = 5000A^@`

B

`lambda gt 5000A^@`

C

`lambda lt 5000 A^@`

D

`lambda lt= 5200 A^@`

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