Chapter 11 – Dual Nature of Radiation and Matter
Sahay Sir > Question Answers > MTG NEET Physics > Part 2 > Chapter 11 - Dual Nature of Radiation and Matter
After absorbing a slowly moving neutron of Mass mN (momentum ≈0) a nucleus of mass M breaks into two nuclei of masses m1 and 5m1 (6m1 = M+mN ) respectively. If the de Broglie wavelength of he nucleus with mass m1 is λ, the de Broglie wavelength of the nucleus will be.
04
Sep
After absorbing a slowly moving neutron of Mass mN (momentum ≈0) a nucleus of mass M breaks into two nuclei of masses m1 and 5m1 (6m1 = M+mN ) respectively. If the de Broglie wavelength of he nucleus with mass m1 is λ, the de Broglie wavelength of the nucleus will be. If [...]
A photocell with a constant potential difference of V volt across it, is illuminated by a point source from a distance of 25 cm. when the source is moved to a distance of 1 m, the electrons emitted by the photocell
04
Sep
A photocell with a constant potential difference of V volt across it, is illuminated by a point source from a distance of 25 cm. when the source is moved to a distance of 1 m, the electrons emitted by the photocell A photocell with a constant potential difference of V volt across it is illuminated [...]
The ratio of the de-Broglie wavelengths of an electron of energy 10 eV to that of a person of mass 66 kg travelling with a speed of 100km/h is of the order of
04
Sep
The ratio of the de-Broglie wavelengths of an electron of energy 10 eV to that of a person of mass 66 kg travelling with a speed of 100km/h is of the order of The ratio of the de-Broglie wavelengths of an electron of energy 10 eV to that of a person of mass 66 kg [...]
If the kinetic energy of a particle is increased by 9 times, the percentage change in the de Broglie wavelength of the particle is:
04
Sep
If the kinetic energy of a particle is increased by 9 times, the percentage change in the de Broglie wavelength of the particle is: If the kinetic energy of a particle is increased by 9 times the percentage change in the de-Broglie wavelength of the particle is September 4, 2021 Category: Chapter 11 - Dual [...]
The ratio of de-Broglie wavelength of a α particle to that of a proton being subjected to the same magnetic field so that the radii of their path are equal each other assuming the field induction vector B is perpendicular to the velocity vectors of the α−particle and the proton, is
04
Sep
The ratio of de-Broglie wavelength of a α particle to that of a proton being subjected to the same magnetic field so that the radii of their path are equal each other assuming the field induction vector B is perpendicular to the velocity vectors of the α−particle and the proton, is Angular momentum (L) and [...]
The number of photons (λ=6630 Ao ) that strike per second on a totally reflecting screen (as shown in figure), so that a force of 1 N is exerted on the screen, is approximately:
04
Sep
The number of photons (λ=6630 Ao ) that strike per second on a totally reflecting screen (as shown in figure), so that a force of 1 N is exerted on the screen, is approximately: is approximately so that a force of 1 N is exerted on the screen The number of photons (λ=6630 Ao ) [...]
A parallel beam of monochromatic light of wavelength 663 nm is incident on a totally reflecting plane mirror. The angle of incidence is 60 degree and the number of photons striking the mirror per second is (5 x (10^19)). Calculate the force exerted by the light beam on the mirror.
04
Sep
A parallel beam of monochromatic light of wavelength 663 nm is incident on a totally reflecting plane mirror. The angle of incidence is 60 degree and the number of photons striking the mirror per second is (5 x (10^19)). Calculate the force exerted by the light beam on the mirror. Angular momentum (L) and radius [...]
The work function for Al, K and Pt is 4.28 e V, 2.30 e V and 5.65 eV respectively. Their respective threshold frequencies would be
04
Sep
The work function for Al, K and Pt is 4.28 e V, 2.30 e V and 5.65 eV respectively. Their respective threshold frequencies would be 2.30 e V and 5.65 eV respectively. Their respective threshold frequencies would be K and Pt is 4.28 e V The work function for Al September 4, 2021 Category: Chapter [...]
The graphs show the variation of current I (y-axis) in two photocell A and B as a function of the applied voltage V (x-axis) when light of same frequency is incident on the cell. Which of the following is the correct conclusion drawn from the data?
04
Sep
The graphs show the variation of current I (y-axis) in two photocell A and B as a function of the applied voltage V (x-axis) when light of same frequency is incident on the cell. Which of the following is the correct conclusion drawn from the data? Angular momentum (L) and radius (r) of a hydrogen [...]
A beam of light consists of four wavelength 4000Å, 4800A, 6000A and 7000Å, each of intensity 1.5×10^−3Wm^−2. The beam falls normally on an area 10^−4m^2 of a clean metallic surface of work function 1.9eV. Assuming no loss of light energy (i.e. each capable photon emits one electron) calculate the number of photoelectrons liberated per second.
29
Nov
A beam of light consists of four wavelength 4000Å, 4800A, 6000A and 7000Å, each of intensity 1.5×10^−3Wm^−2. The beam falls normally on an area 10^−4m^2 of a clean metallic surface of work function 1.9eV. Assuming no loss of light energy (i.e. each capable photon emits one electron) calculate the number of photoelectrons liberated per second. [...]