Dual Nature of Matter and Radiation
Photoelectric effect, de Broglie hypothesis, Davisson-Germer experiment.
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Take a full mock →Q1 · Dual Nature of Matter and Radiation · MEDIUM
A photon of energy 5 eV strikes a metal surface whose work function is 2 eV. The maximum kinetic energy of the emitted photoelectron is:
Q2 · Dual Nature of Matter and Radiation · MEDIUM
In a photoelectric experiment, light of wavelength 400 nm is incident on a metal surface. If the stopping potential is 1.0 V, what is the work function of the metal? (Given: h = 6.6 × 10⁻³⁴ J·s, c = 3 × 10⁸ m/s, e = 1.6 × 10⁻¹⁹ C)
Q3 · Dual Nature of Matter and Radiation · MEDIUM
An electron is accelerated through a potential difference of 100 V. What is the de Broglie wavelength associated with it? (Given: mass of electron = 9.1 × 10⁻³¹ kg, h = 6.6 × 10⁻³⁴ J·s, e = 1.6 × 10⁻¹⁹ C)
Q4 · Dual Nature of Matter and Radiation · HARD
In the Davisson-Germer experiment, electrons accelerated through 54 V showed a strong diffraction peak at an angle of 50° to the incident beam. If the spacing between atomic layers in the nickel crystal was 0.091 nm, what is the order of diffraction observed? (Given: h = 6.63 × 10⁻³⁴ J·s, mass of electron = 9.1 × 10⁻³¹ kg, e = 1.6 × 10⁻¹⁹ C, sin 25° = 0.42)
Q5 · Dual Nature of Matter and Radiation · MEDIUM
Light of wavelength 3000 Å falls on a metal surface having work function 2.3 eV. The maximum kinetic energy of the ejected photoelectrons is (Take h = 6.6 × 10⁻³⁴ Js, c = 3 × 10⁸ m/s, 1 eV = 1.6 × 10⁻¹⁹ J):