Will there be photoelectric emission for an incident wavelength of 3900 A° if threshold wavelength is 4000 A° ?
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We know, if the frequency of the incident radiation is greater than the threshold frequency, photoelectric emission will occur.
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The threshold wavelength is 5200
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. For a photoelectric emission to take place the wavelength of incident light must be less than the threshold value. The wavelength of UV rays is 100−4000
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. so Photoelectrons will be emitted when this material is illuminated with monochromatic radiation from a 1W ultraviolet lamp.
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