Dual nature of particles was proposed by

$A$ $0.66 \ kg$ ball is moving with a speed of $100 \ m/s$. The associated wavelength will be $(h = 6.6 \times 10^{-34} \ J \ s)$.

If the kinetic energy of an electron is increased four times,the wavelength of the de-Broglie wave associated with it would become

Similar to electron diffraction, neutron diffraction is also used for the determination of the structure of molecules. If the wavelength used is $800 \, pm$, calculate the characteristic velocity associated with the neutron.

The wavelength of a moving electron-

If $v_0$ is the threshold frequency of a metal $X$,the correct relation between de Broglie wavelength $(\lambda)$ associated with the photoelectron and the frequency $(v)$ of the incident radiation is: