Dual Nature of ...

The de-Broglie wavelength associated with a particle with rest mass 0 m and moving with speed of light in vacuum is..................

A proton and electron are lying in a box having unpenetrable walls, the ratio of uncertainty in their velocities are........( m_e = mass of electron and m_p = mass of proton.)

Photons of energy 1 eV and 2.5 ev successively illuminate a metal, whose work function is 0.5 eV, the ratio of maximum speed of emitted electron is..........................

The uncertainty in position of a particle is same as its de-Broglie wavelength, uncertainty in its momentum is.......................

Wavelength of an electron having energy 10 keV is....... Å

Wavelength λ_A and λ_B are incident on two identical metal plates and photo electrons are emitted. If λ_a = 2λ_B , the maximum kinetic energy of photo electrons is................

The de-Broglie wave length of a particle having velocity of 2.25 × 10⁸ ms^–1, is the same value of a photon wavelength, then the ratio of kinetic energy and photon energy of the particle is ......(c = 3 × 10⁸ ms^–1 )

The ration of de - Begli wavelengths of molecules of hydrogen and helium which are at temperature 27^o and 127^oC respectively is...................

A photon, an electron and a uranium nucleus all have same wavelength. The one with the most energy..................

A light of frequency 1.5 times the threshold frequency is incident on photo-sensitive material. If the frequency is halved and intensity is doubled, the photoelectric current becomes....................