Questions
Radiations of two different frequencies whose photon energies are 3.4 eV and 8.2 eV successively illuminate a metal surface whose work function is 1.8eV. The ratio of the maximum speeds of the emitted electrons will be
detailed solution
Correct option is B
12mv2=E−w vαE−w v1:v2=E1−w:E2−w =3.4−1.8:8.2−1.8=1.6:6.4 =1:4 =1:2Talk 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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