Dual Nature of Matter and Radiation questions
494 published questions with worked solutions.
- UV light of 4.13 eV is incident on a photosensitive metal surface having work function 3.13 eV. The maximum kinetic energy of...
- A proton, an electron and an alpha particle have the same energies. Their de-Broglie wavelengths will be compared as: a
- An object is placed in a medium of refractive index 3. An electromagnetic wave of intensity 6 × 10⁸ W/m² falls normally on the...
- A convex lens of focal length 40 cm forms an image of an extended source of light on a photoelectric cell. A current I is...
- The de-Broglie wavelength of an electron is the same as that of a photon. If velocity of electron is 25% of the velocity of...
- The work function of a substance is 3.0 eV. The longest wavelength of light that can cause the emission of photoelectrons from...
- In a photoelectric effect experiment a light of frequency 1.5 times the threshold frequency is made to fall on the surface of...
- When a metal surface is illuminated by light of wavelength λ, the stopping potential is 8V. When the same surface is illuminated...
- The temperature of an ideal gas in 3-dimensions is 300 K. The corresponding de-Broglie wavelength of the electron approximately...
- The stopping potential in the context of photoelectric effect depends on the following property of incident electromagnetic...
- Two identical photocathodes receive the light of frequencies f_1 and f_2 respectively. If the velocities of the photo-electrons...
- If 2.5 10^ -6 N average force is exerted by a light wave on a non-reflecting surface of 30 cm ^2 area during 40 minutes of time...
- The speed of electrons in a scanning electron microscope is 1 10^7 ms^ -1 . If the protons having the same speed are used instead...
- A particle is travelling 4 times as fast as an electron. Assuming the ratio of de-Broglie wavelength of a particle to that of...
- An electron having de-Broglie wavelength is incident on a target in a X-ray tube. Cut-off wavelength of emitted X-ray is :
- A certain metallic surface is illuminated by monochromatic radiation of wavelength . The stopping potential for photoelectric...
- The radiation corresponding to 3 2 transition of a hydrogen atom falls on a gold surface to generate photoelectrons. These...
- An electron of mass m_e and a proton of mass m_p are accelerated through the same potential difference. The ratio of the...
- Given below are two statements : Statement-I : Two photons having equal linear momenta have equal wavelengths. Statement-II : If...
- The work functions for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein's equation, the metals...
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