Dual Nature of Radiation and Matter Photo Electric Effect The phenomenon of photoelectric effect is discovered by Hertz in 1887 When the light of certain frequency is allowed to fall on a metal surface and electrons are ejected from the metal surface this phenomenon is called photoelectric effect Or...

MCQ Physics - Topic Electromagnetic Wave Que 1 The dimensional formula of 1/(magnetic permeability×electric permittivity) a) [LT^-1] b) [L^-1T] c) [L^2T^-2] d) [TL] Ans (c) Que 2 The electromagnetic wave which has least wavelength a) Radio waves b) X rays c) microwaves d) Gamma waves Ans (d) Que 3 T...