Dual Nature of Matter and Radiation questions
494 published questions with worked solutions.
- Average force exerted on a non-reflecting surface at normal incidence is 2.4 × 10⁻⁴ N. If 360 W/cm² is the light energy flux...
- A proton and an electron have the same de Broglie wavelength. If K_p and K_e be the kinetic energies of proton and electron...
- Particle A of mass m_A= m 2 moving along the x-axis with velocity v_0 collides elastically with another particle B at rest having...
- A beam of electrons of energy E scatters from a target having atomic spacing of 1Å. The first maximum intensity occurs at = 60°....
- The surface of a metal is illuminated alternately with photons of energies E_1 = 4eV and E_2 = 2.5 eV respectively. The ratio of...
- An electron, doubly ionized helium ion (He^ ++ ) and a proton are having the same kinetic energy. The relation between their...
- Assuming the nitrogen molecule is moving with r.m.s. velocity at 400 K, the de-Broglie wavelength of nitrogen molecule is close...
- If c is the velocity of light in free space, the correct statements about photon among the following are : A. The energy of a...
- Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. What will be the photoelectric...
- When two monochromatic lights of frequency, and 2 are incident on a photoelectric metal, their stopping potential becomes V_s 2...
- For a certain metal, when monochromatic light of wavelength λ is incident, the stopping potential for photoelectrons is 3V₀. When...
- Match the LIST-I with LIST-II List-I: A. Planck's constant, B. Stopping potential, C. Work function, D. Threshold frequency...
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The...
- An electron is travelling with a velocity v in free space and when it enters a medium, its velocity is reduced by 20%. The de...
- An electron of mass m is moving in an electric field E=-2E_0 i (E₀=constant>0), with an initial velocity V=v_0 i (v₀=constant>0)....
- Light source having wavelength 331 nm is used to generate photo-electrons whose stopping potential is 0.2 V. The work function of...
- The de Broglie wavelength for an electron accelerated through the potential difference of V₁ volt is λ₁. When the potential...
- The work functions of Caesium (Cs), Potassium (K) and Sodium (Na) are 2.14 eV, 2.30 eV and 2.75 eV respectively. If incident...
- An electromagnetic wave of wavelength ' ' is incident on a photosensitive surface of negligible work function. If 'm' mass is of...
- The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600 nm, when it...
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