List of top Physics Questions on Quantum Physics

The stopping potential for a fast moving photo-electron is independent of:
In Compton scattering, Compton shift equals Compton wavelength if angle of scattering is:
Consider the following statements about light:
A. photoelectric effect exhibits wave nature of light.
B. Compton effect exhibits wave nature of light.
C. photoelectric effect exhibits particle nature of light.
D. Compton effect exhibits particle nature of light.
Choose the CORRECT answer from the options given below:
The frequency of a photon of energy 1.326 eV is:
Which of the following phenomena cannot be explained by the wave theory of light?
Write de-Broglie formula for the wavelength of matter waves.
What are matter waves? Explain. Write the formula for de Broglie wavelength. Write the name of the experiment which shows the dual nature of particles.
A proton and an \( \alpha \)-particle are accelerated by the same potential difference. Find out the ratio of their de Broglie wavelengths.
Draw a graph between de Broglie wavelength (\(\lambda\)) and momentum (\(p\)) of a moving particle. A proton and an \(\alpha\)-particle are accelerated by the same potential. Compute the ratio of their de Broglie wavelengths.
Electrons and protons are accelerated by the same potential difference. The ratio of their de Broglie wavelengths is:
Write equation of energy of photon in terms of Planck's constant (h) and wavelength (\(\lambda\)).
Write the de Broglie wavelengths in terms of kinetic energy.
Which of the following quantity has the dimension of length? (where \(h\) is Planck’s constant, \(m\) is the mass of electron and \(c\) is the velocity of light):
The de Broglie wavelength is:
Photocell is based on:
Cathode rays are group of:
If wavelength \( \lambda \) represents wave property and momentum \( p \) represents the particle property, then what will the expressions \( \lambda = \frac{h}{p} \) and \( p = \frac{h}{\lambda} \) represent?
A 60 W source emits monochromatic light of wavelength 662.5 nm. The number of photons emitted per second is
Which one of the following is \textit{not a linear operator?}
The potential of an atom is given by \(V=Vo\ log_e (\frac {r}{r_o})\), where \(r_o\) is a constant and \(r\) is the radius of the orbit. Assuming Bohr's model to be applicable, which variation of \(r_n\) with \(n\) is possible (\(n\) being principal quantum number)?
The wavelength \(λ\) of a photon and the de-Broglie wavelength of an electron have the same value. Find the ratio of energy of photon to the kinetic energy of electron in terms of mass \(m\), speed of light \(c\) and planck constant.