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A plane light wave of intensity I = 0.20 W /cm ^2 falls on a plane mirror surface with reflection coefficient rho = 0.8. The angle of incidence is 45. In terms of corpuscular theory, find the magnitude A plane light wave of intensity I = 0.20 W /cm ^2 falls on a plane mirror [...]

A charged particle of unit mass and unit charge moves with velocity v = (8 i + 6 j ) m/s in a magnetic field of B = 2 kT. Choose the correct alternatives. A charged particle of unit mass and unit charge moves with velocity v = (8 i + 6 j ) m/s [...]

A charged particle moves in a gravity free space where an electric filed of strength E and a magnetic field of induction B exists. Which of the following is /are correct? A charged particle moves in a gravity free space where an electric filed of strength E and a magnetic field of induction B exists. [...]

A nozzle throws a stream of gas against a wall with a velocity v much larger than the thermal agitation of the molecules. The wall deflects the molecules without changing the magnitude of their velocity. electrons are emitted. What will be the maximum velocity of emitted electrons? Work function of nickel is 5.01 eV. When [...]

How many photons of radiation of wavelength lemda = 5 * 10^-7 m must fall per second on a blackend plate in order to produce a force of 6.62 * 10^-5 N? How many photons of radiation of wavelength lemda = 5 * 10^-7 m must fall per second on a blackend plate in order [...]

A photon of wavelength 0.1 A is emitted by a helium atom as a consequence of the emission of photon. The KE gained by helium atom is A photon of wavelength 0.1 A is emitted by a helium atom as a consequence of the emission of photon. The KE gained by helium atom is October [...]

The eye can detect 5 * 10^4 photons ( m^2 s)^-1 of green light (lemda = 5000 A), while ear can detect 10^-13 W/m^2. As a power detector, which is more sensitive and by what factor? The eye can detect 5 * 10^4 photons ( m^2 s)^-1 of green light (lemda = 5000 A) which [...]

The maximum velocity of electrons emitted from a metal surface is v. What would be the maximum velocity if the frequency of incident light is increased by a factor of 4 ? The maximum velocity of electrons emitted from a metal surface is v. What would be the maximum velocity if the frequency of incident [...]

A particle having a mass of 0.5 g carries a charge of 2.5 x 10^-8 C. The particle is given an initial horizontal velocity of 6 x 10^4 m/s. To keep the particle moving in a horizontal direction A particle having a mass of 0.5 g carries a charge of 2.5 x 10^-8 C. The [...]

A charged particle P leaves the origin with speed v = v0 at some inclination with the x – axis. There is a uniform magnetic field B along the x – axis . P strikes a fixed target T on the x – axis for a minimum value of B = B0. P will also [...]