Questions
The maximum wavelength of a beam of light can be used to produce photo electric effect on a metal is 250 nm. The energy of the electrons in Joule emitted from the surface of the metal when a beam of light of wavelength 200 nm is used
detailed solution
Correct option is D
kE=hcλ−hcλ0 =12,400λ−12,400λ0 =12,4002000−12,4002500 =6.2−4.96 =1.24eV =1.24×1.6×10−19J =19.86×10−20JTalk to our academic expert!
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Figure shows the stopping potential (V)versus frequency (v) graph for photoelectric effect in a metal. From the graph, The Planck's constant (h) is . The value of y is
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