Modern Physics 2 Question 26
25. The threshold wavelength for photoelectric emission from a material is . Photoelectrons will be emitted when this material is illuminated with monochromatic radiation from a
(1982, 3M)
(a)
(c)
(b)
(d)
Integer Answer Type Questions
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Solution:
- For photoemission to take place, wavelength of incident light should be less than the threshold wavelength. Wavelength of ultraviolet light
while that of infrared radiation > .