Dual Nature of ...

If light of wavelength λ₁ is allowed to fall on a metal,then kinetic energy of photoelectrons emitted is E₁. If wavelength of light changes to λ₂ then kinetic energy of electrons changes to E₂. Then work function of the metal is

If maximum velocity with which an electron can be emitted from a photo cell is 4 × 10⁸ cm/s, the stopping potential is (mass of electron = 9 × 10^–31 kg)

The collector plate in an experiment on photoelectric effect is kept vertically above the emitter plate. Light source is put on and a saturation photo current is recorded. An electric field is switched on which has a vertically downward direction

If the momentum of an electron is changed by ∆p, thenthe de-Broglie wavelength associated with it changes by 0.50% . The initial momentum of the electron will be

Two large parallel plates are connected with the terminal of 100 V power supply. These plates have a fine hole at the centre. An electron having energy 200 eV is so directed that it passes through the holes. When it comes out it\'s de-Broglie wavelength is

If the potential difference between the anode and cathode of the X-ray tube is increase

Monochromatic light of wavelength 3000 Å is incident on a surface area 4 cm². If intensity of light is 150 mW/m², then rate at which photons strike the target is

For characteristic X-ray of some material

The maximum velocity of electrons emitted from a metal surface is V when frequency of light falling on it is f. The maximum velocity when frequency becomes 4f is