The momentum of a photon of energy 1 MeV in kg m/s will be
The momentum of a photon of energy 1 MeV in kg m/s will be
Options
(a) 5 x 10⁻²² (b) 0.33 x 10⁶ (c) 7 x10⁻²⁴ (d) 10⁻²²
Correct Answer:
5 x 10⁻²²
Explanation: […]
Dual Nature of Matter and Radiation
In a discharge tube ionization of enclosed gas is produced due to collisions between
In a discharge tube ionization of enclosed gas is produced due to collisions between
Options
(a) Netural gas atoms/molecules (b) Positive ions and neutral atoms/molecules (c) Negative electrons and neutral atoms/molecules (d) Photons […]
We get Balmer series when electron comes from
We get Balmer series when electron comes from
Options
(a) Higher to 2nd orbit (b) 2nd to higher orbit (c) Higher to first orbit (d) None of these
Correct Answer:
Higher to 2nd […]
Which of the following are mechanical waves?
Which of the following are mechanical waves?
Options
(a) Light waves (b) Sound waves (c) X-rays (d) Ratio waves
Correct Answer:
Sound waves
Explanation:
No explanation available. Be the first to write the […]
The wavelength of the matter wave is independent of
The wavelength of the matter wave is independent of
Options
(a) Mass (b) Velocity (c) Momentum (d) Charge
Correct Answer:
Charge
Explanation:
No explanation available. Be the first to write the explanation for […]
α-particles, deuterons and protons of same energy are moving in a perpendicular
α-particles, deuterons and protons of same energy are moving in a perpendicular magnetic field. The ratio of diameters of their circular paths will be
Options
(a) (1:√2:1) (b) (√2:1:1) (c) (2:1:1) (d) (1:1:2)
When photons of energy hν are incident on the surface of photosensitive
When photons of energy hν are incident on the surface of photosensitive material of work function hν₀, then
Options
(a) The kinetic energy of all emitted electrons is hν₀ (b) The kinetic energy […]
The de-Broglie wavelength of neutron in thermal equilibrium at temperature T is
The de-Broglie wavelength of neutron in thermal equilibrium at temperature T is
Options
(a) 30.8 / √T Å (b) 3.08 / √T Å (c) 0.308 / √T Å (d) 0.0308 / √T Å
The photoelectric threshold frequency of a metal is ν. When light of frequency 4ν
The photoelectric threshold frequency of a metal is ν. When light of frequency 4ν is incident on the metal, the maximum kinetic energy of the emitted photoelectron is
Options
(a) 4hν (b) 3hν […]
The wavelength λₑ of an electron and λₚ of a photon are of same energy E are related by
The wavelength λₑ of an electron and λₚ of a photon are of same energy E are related by
Options
(a) λₚ ∞ λₑ (b) λₚ ∞ √λₑ (c) λₚ ∞ 1/√λₑ (d) […]