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 proton and an electron have the same kinetic energy. Which has a longer de Broglie wavelength?
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.
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)
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)
(1) Light always behaves as a wave. (2) Light always behaves as a particle. (3) Light exhibits both wave and particle properties. (4) Light is neither a wave nor a particle. Which statement is correct?
Which of the following best describes the dual nature of matter? (1) Only waves (2) Only particles (3) Both waves and particles (4) Neither waves nor particles
Which of the following is a direct consequence of the quantization of energy? (1) Continuous emission spectra (2) Discrete emission spectra (3) Ohm's law (4) Newton's laws
Which of the following is NOT a consequence of the dual nature of matter and radiation? (1) Electron diffraction (2) Compton effect (3) Blackbody radiation (4) Ohm's law
If the frequency of incident light is less than the threshold frequency, photoelectric emission _____.
The de Broglie wavelength of a particle is given by the formula λ = _____.
The kinetic energy of the emitted photoelectron is given by the equation K.E. = _____.
The momentum of a photon of wavelength 500 nm is _____. (h = 6.63 × 10-34 Js)
True or False: The Compton effect can be explained by the wave theory of light.
True or False: The de Broglie wavelength of a macroscopic object is measurable in practice.
True or False: The energy of a photon is directly proportional to its frequency.
True or False: The intensity of light affects the maximum kinetic energy of photoelectrons.
