JEE Main Dual Nature of Radiation and Matter — practice questions
40 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice JEE Main 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:Doubling the intensity of incident light on a metal plate above threshold frequency changes:A metal has work function $2$ eV. Incident light of frequency $1\times 10^{15}$ Hz gives max KE (using $h = 4.An electron of momentum $p = 6.626\times 10^{-24}$ kg m/s has de Broglie wavelength:The Davisson-Germer experiment scattered electrons off a nickel crystal and observed:The specific charge (e/m) of the electron, determined by J. J. Thomson, is approximatelyMillikan's oil-drop experiment established thatThe work function φ₀ of a metal is best defined as1 electron-volt (eV) equalsWhich of these emission processes does NOT depend on a threshold frequency of incident radiation?For a given photosensitive metal, the photoelectric current at fixed frequency (above threshold) depends on thThe stopping potential V₀ at a given frequency of incident light isThe K_max of the emitted photoelectron is related to the stopping potential V₀ byMetals like Li, Na, K and Cs are photosensitive even to visible light because theyIf the frequency of incident light is doubled while the intensity is halved, the number of photoelectrons emitThe graph of stopping potential V₀ vs frequency ν of incident light for a given metal isThe threshold frequency ν₀ for a metal is related to its work function byPhotoelectric emission was discovered by Heinrich Hertz during his experiments onCathode rays were first identified byAn electron accelerated through 100 V has kinetic energy (in eV) equal to