Dual Nature of Radiation and Matter

Related Questions

• An X-ray tube operates on 30 kV. What is the minimum wavelength emitted $(h = 6.6 \times {10^{ - 34}}$Js, $e = 1.6 \times {10^{ - 19}}$Coulomb, $c = 3 \times {10^8}$ms–1)

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• When a metal surface is illuminated by light of wavelengths 400 nm and 250 nm, the maximum velocities of the photoelectrons ejected are $v$ and $2v$ respectively. The work function of the metal is (h = Planck’s constant, c = velocity of light in air)

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• By photoelectric effect, Einstein, proved

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• While doing his experiment, Millikan one day observed the following charges on a single drop (i) $6.563 \times {10^{ - 19}}C$ (ii) $8.204 \times {10^{ - 19}}C$ (iii) $11.50 \times {10^{ - 19}}C$ (iv) $13.13 \times {10^{ - 19}}C$ (v) $16.48 \times {10^{ - 19}}C$ (vi) $18.09 \times {10^{ - 19}}C$ From this data the value of the elementary charge (e) was found to be

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• The maximum kinetic energy of photoelectrons emitted from a surface when photons of energy 6 eV fall on it is 4 eV. The stopping potential in volts is

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