Practice portal › Dual Nature of Matter and Radiation › Einstein's Photoelectric Equation and Work Function
Asked in AIPMT 1991 · Speed and kinetic energy of the photoelectrons
Photon energy: E=(hc)/λ=(12400 eV ångström)/(3000 ångström)=4.13 eV.
Maximum kinetic energy: Kₘₐₓ=4.13-1=3.13 eV=5.0×10⁻¹⁹ J.
v=√(2Kₘₐₓ)/m=√(2×5.0×10⁻¹⁹)/(9.1×10⁻³¹).
v=√1.10×10¹²=1.05×10⁶ m s⁻¹.
To the nearest option, 10⁶ m s⁻¹.
Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.
Practise this with a timer