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Sahay Sir > Question Answers > NCERT Exemplar Class 12 > Physics > Chapter 11 - Dual Nature of Radiation and Matter > Light of frequency 7.21×10^14Hz is incident on a metal surface. Electrons with a maximum speed of 6.0×10^5 ms^−1 are ejected from the surface. What is the threshold frequency for photoemission of electrons?

Light of frequency 7.21×10^14Hz is incident on a metal surface. Electrons with a maximum speed of 6.0×10^5 ms^−1 are ejected from the surface. What is the threshold frequency for photoemission of electrons?

Find the (a) maximum frequency and