When a piece of metal is illuminated by a monochromatic light of wavelength λ,
When a piece of metal is illuminated by a monochromatic light of wavelength λ, then stopping potential is 3Vs. When…
6 years ago
Dual Nature of Matter and Radiation
In the phenomenon of electric discharge through gases at low pressure,
In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a…
6 years ago
Photon of frequency ν has a momentum associated with it. If c is the velocity
Photon of frequency ν has a momentum associated with it. If c is the velocity of light, the momentum is…
6 years ago
What is the energy of He⁺ electron in first orbit?
What is the energy of He⁺ electron in first orbit? Options (a) (40.8 eV) (b) (-52.2 eV) (c) (-54.4 eV)…
6 years ago
If h is Planck’s constant, the momentum of a photon of wavelength 0.01 Å is
If h is Planck's constant, the momentum of a photon of wavelength 0.01 Å is Options (a) 10⁻² h (b)…
6 years ago
If the velocity of an electron increases, then its de Broglie wavelength will
If the velocity of an electron increases, then its de Broglie wavelength will Options (a) Increase (b) Decrease (c) Remain…
6 years ago
If the radioactive dacay constant of radium is 1.07 x 10⁻⁴ year⁻¹, then its half-life
If the radioactive dacay constant of radium is 1.07 x 10⁻⁴ year⁻¹, then its half-life is approximately Options (a) 8900…
6 years ago
The electromagnetic theory of light failed to explain
The electromagnetic theory of light failed to explain Options (a) Photoelectric effect (b) polarisation (c) diffraction interference (d) Correct Answer:…
6 years ago
The Priniple of LASER action involves
The Priniple of LASER action involves Options (a) Amplification of particular frequency emitted by the system (b) Population inversion (c)…
6 years ago
The time by a photoelectron to come out after the photon strikes is approximately
The time by a photoelectron to come out after the photon strikes is approximately Options (a) 10⁻¹ s (b) 10⁻⁴…
6 years ago