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Threshold wavelength for photoelectric emission from a metal surface is . Photoelectrons will be emitted when this surface is illuminated with monochromatic radiation from -
Option: 1
lamp
Option: 2
lamp
Option: 3
lamp
Option: 4
lamp
Answers (1)
is invisible region required wavelength should be smaller than threshold wavelength.
And from the electromagnetic spectrum we can observe that the wavelength range lies within the order of UV rays.
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