Dual Nature of Matter and Radiation
Physics ⇒ Modern Physics
Dual Nature of Matter and Radiation starts at 11 and continues till grade 12.
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A beam of electrons is accelerated through a potential difference of 100 V. Calculate the de Broglie wavelength of the electrons. (h = 6.63 × 10-34 Js, me = 9.1 × 10-31 kg, e = 1.6 × 10-19 C)
A photon has an energy of 3.0 eV. What is its frequency? (h = 6.63 × 10-34 Js, 1 eV = 1.6 × 10-19 J)
A proton and an electron have the same kinetic energy. Which has a longer de Broglie wavelength?
Calculate the de Broglie wavelength of an electron moving with a velocity of 2.2 × 106 m/s. (Mass of electron = 9.1 × 10-31 kg, h = 6.63 × 10-34 Js)
Describe how the intensity of light affects the photoelectric current.
Describe the Compton effect and its significance.
Explain why electrons show significant wave properties while a cricket ball does not.
Explain why the photoelectric effect cannot be explained by classical wave theory.
Explain why the photoelectric effect supports the particle nature of light.
If the work function of a metal is 2.0 eV, what is the threshold wavelength for photoemission? (h = 6.63 × 10-34 Js, c = 3 × 108 m/s, 1 eV = 1.6 × 10-19 J)
State one application of the photoelectric effect in modern technology.
State Planck's quantum hypothesis.
State the photoelectric effect.
The energy of a photon is 2.5 × 10-19 J. What is its wavelength? (h = 6.63 × 10-34 Js, c = 3 × 108 m/s)
The work function of a metal is 4.0 eV. Will light of wavelength 400 nm cause photoemission from this metal? (h = 6.63 × 10-34 Js, c = 3 × 108 m/s, 1 eV = 1.6 × 10-19 J)
What is meant by the term 'work function' of a metal?
What is the relationship between the energy and wavelength of a photon?
What is the significance of the Davisson-Germer experiment?
What is the threshold frequency in the context of the photoelectric effect?
Which experiment first demonstrated the quantization of energy in electromagnetic radiation?
