The threshold frequency for a certain photosensitive metal is ν₀. When it is illuminated by light of frequency ν=2ν₀, the maximum velocity of photoelectrons is ν₀. What will be the maximum velocity of the photoelectrons […]
The de-Broglie wavelength of an electron moving with a velocity 1.5×10⁸ ms⁻¹ is equal to that of a photon. The ratio of the kinetic energy of the electron to the energy of the photon is […]
The electron of a hydrogen atom revolves round the proton in a circular nth orbit of radius rn=ε₀n²h²/(πme²) with a speed vn=e²/2ε₀nh. The current due to the cirulating charge is proportional to
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A radioactive substance emits n beta particles in the first 2 s and 0.5 n beta particles in the next 2 s. The mean life of the sample is
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(a) 4 s […]
The wave function (in SI unit) for a light wave is given as Ψ(x,t)= 10³ sin π(3×10⁶ x-9×10¹⁴ t) . The frequency of the wave is equal to
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(a) 4.5×10¹⁴ Hz (b) […]
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