A surface irradiated with light of wavelength 480 nm gives out electrons with maximum velocity v m/s, the cut off wavelength being 600 nm . The same surface would release electrons with maximum veloci

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A surface irradiated with light of wavelength 480 nm gives out electrons with maximum velocity v m/s, the cut off wavelength being 600 nm . The same surface would release electrons with maximum velocity 2 v m/s if it irradiated by light of wavelength

TestHub · Accepted Answer

2 1 ​ m v 2 = h c ( 480 1 ​ − 600 1 ​ ) Doubling speed multiplies kinetic energy by four ​ λ ′ 1 ​ − 600 1 ​ = 4 ( 480 1 ​ − 600 1 ​ ) ​ λ ′ = 300 nm ​

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