PUCET (Punjab) Dual Nature of Radiation and Matter — practice questions
21 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice PUCET (Punjab) Dual Nature of Radiation and Matter in the app →Photoelectric effect was explained by:Photon energy:de Broglie wavelength λ associated with a particle of momentum p:In photoelectric effect, intensity of light affects:Einstein's photoelectric equation:Threshold frequency ν₀ for photoemission:de Broglie wavelength of electron accelerated through V volts:For very slow electron (low momentum), de Broglie wavelength is:Davisson-Germer experiment demonstrated:For photon, momentum p = E/c =A metal has work function 2.0 eV. Light of wavelength 400 nm (3.1 eV) shines on it. Max KE of photoelectrons:Threshold wavelength for a metal with work function 3 eV:de Broglie wavelength of a 1 kg ball moving at 1 m/s:For accelerated electron with KE = 100 eV, de Broglie wavelength:Energy of photon with momentum 3.3 × 10⁻²⁵ kg m/s:For photoelectric experiment, plot of KE_max vs frequency ν is:In Compton scattering at 90° (cos 90 = 0), wavelength shift:Maximum velocity of photoelectrons from a metal of work function 2 eV, illuminated by 200 nm light:de Broglie wavelength of proton accelerated through 1000 V:Photon flux (photons/sec) for 1 W of green light (λ = 550 nm):Heisenberg uncertainty: for an electron in atom (Δx ~ 10⁻¹⁰ m), minimum momentum uncertainty: