Dual Nature of Matter and Radiation questions
494 published questions with worked solutions.
- A particle having electric charge 3 10^ -19 C and mass 6 10^ -27 kg is accelerated by applying an electric potential of 1.21 V....
- Light is incident on a metallic plate having work function 110 10^ -20 J. If the produced photoelectrons have zero kinetic energy...
- The de Broglie wavelength of an oxygen molecule at 27^ is x 10^ -12 m. The value of x is (take Planck's constant = 6.63 10^ -34...
- The work functions of two metals (M_A and M_B) are in the 1:2 ratio. When these metals are exposed to photons of energy 6 eV, the...
- When a light of a given wavelength falls on a metallic surface the stopping potential for photoelectrons is 3.2 V. If a second...
- The ratio of de Broglie wavelength of a deutron with kinetic energy E to that of an alpha particle with kinetic energy 2E, is...
- An electron in the ground state of the hydrogen atom has the orbital radius of 5.3 × 10⁻¹¹ m while that for the electron in third...
- The work functions of cesium (Cs) and lithium (Li) metals are 1.9 eV and 2.5 eV, respectively. If we incident a light of...
- A light source of wavelength illuminates a metal surface and electrons are ejected with maximum kinetic energy of 2 eV. If the...
- In photoelectric effect an em-wave is incident on a metal surface and electrons are ejected from the surface. If the work...
- An electron of mass 'm' with an initial velocity v = v_0 i (v_0 > 0) enters an electric field E = -E_0 k . If the initial de...
- In photoelectric effect, the stopping potential (V_0) v/s frequency ( ) curve is plotted. (h is the Planck's constant and _0 is...
- The energy E and momentum p of a moving body of mass m are related by some equation. Given that c represents the speed of light,...
- The ratio of the power of a light source S_1 to that the light source S_2 is 2. S_1 is emitting 2 10^ 15 photons per second at...
- A proton of mass 'm_p' has same energy as that of a photon of wavelength ' '. If the proton is moving at non-relativistic speed,...
- Which of the following phenomena can not be explained by wave theory of light ?
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) :...
- In an experiment with photoelectric effect, the stopping potential.
- The radiation pressure exerted by a 450 W light source on a perfectly reflecting surface placed at 2 m away from it, is
- The work function of a metal is 3 eV. The color of the visible light that is required to cause emission of photoelectrons is
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