Dual Nature of Matter and Radiation

JEE Main Physics · 9 questions

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• A monochromatic source of light operating at 15 kW emits 2.5 × 10^22 photons / s. The region of an electromagnetic spectrum to…20268 April, Shift 2 · Q38
• K_1 and K_2 be the maximum kinetic energies of photoelectrons emitted from a surface of a given material for the light of…20268 April, Shift 2 · Q43
• The de Broglie wavelength for an electron accelerated through the potential difference of V_1 volt is λ_1. When the potential…20266 April, Shift 2 · Q47
• An electron is travelling with a velocity v in free space and when it enters a medium, its velocity is reduced by 20 %. The de…20265 April, Shift 2 · Q43
• An electron of mass m is moving in an electric field E=-2 E_o i(E_o=. constant.>0), with an initial velocity V=v_o i (v_o=.…20265 April, Shift 1 · Q35
• Light source having wavelength 331 nm is used to generate photo-electrons whose stopping potential is 0.2 V. The work function of…20265 April, Shift 1 · Q41
• The de Broglie wavelength associated with an electron accelerated through a potential difference V is λ_e and the de Broglie…20264 April, Shift 2 · Q44
• The graph shows variation of stopping potential V_o with the frequency v of the incident radiation for three photosensitive…20264 April, Shift 1 · Q32
• For a certain metal, when monochromatic light of wavelength λ is incident, the stopping potential for photoelectrons is 3 V_o.…20262 April, Shift 1 · Q42