JEE Main & Advanced
Physics
Photo Electric Effect, X- Rays & Matter Waves
Question Bank
Numerical Value Type Questions - Dual Nature of Radiation and Matter
question_answer
Surface of certain metal is first illuminated with light of wavelength \[{{\lambda }_{1}}=350nm\] and then, by light of wavelength \[{{\lambda }_{2}}=540nm.\] It is found that the maximum speed of the photo electrons in the two cases differ by a factor of (2) The work function of the metal (in eV) is (Energy of photon\[=\frac{1240}{\lambda (in\,\,nm)}eV\])