Dual Nature of Matter and Radiation questions
494 published questions with worked solutions.
- The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface, having work...
- The threshold frequency for a photosensitive metal is 3.3 10^ 14 Hz . If light of frequency 8.2 10^ 14 Hz is incident on this...
- Photoelectric emission occurs only when the incident light has more than a certain minimum :
- Electrons used in a electron microscope are accelerated by a voltage of 25 kV. If the voltage is increased to 100 kV then the...
- In photoelectric emission process from a metal of work function 1.8 eV, the kinetic energy of most energetic electrons is 0.5 eV....
- If the momentum of an electron is changed by P, then the de Broglie wavelength associated with it changes by 0.5 %. The initial...
- An -particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of 0.25 Wb/m ^2. The de Broglie...
- A 200 W sodium street lamp emits yellow light of wavelength 0.6 m . Assuming it to be 25 % efficient in converting electrical...
- Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a...
- For photoelectric emission from certain metal the cutoff frequency is . If radiation of frequency 2 impinges on the metal plate,...
- The wavelength _e of an electron and _p of a photon of same energy E are related by -
- A parallel beam of fast moving electrons is incident normally on a narrow slit. A fluorescent screen is placed at a large...
- Light with an energy flux of 25 10^ 4 W m ^ -2 falls on a perfectly reflecting surface at normal incidence. If the surface area...
- When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal...
- If the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de-Broglie...
- An electron of mass m and a photon have same energy E. The ratio of de-Broglie wavelengths associated with them is:
- When a metallic surface is illuminated with radiation of wavelength , the stopping potential is V. If the same surface is...
- The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m, is
- The photoelectric threshold wavelength of silver is 3250 10^ -10 m . The velocity of the electron ejected from a silver surface...
- An electron of mass m with an initial velocity V = V_0 i (V_0 > 0) enters an electric field E = -E_0 i (E_0 = constant > 0) at t...
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