Work functions of four metals M1, M2, M3 and M4 are 4.8, 4.3, 4.75 and 3.75 eV respectively. The metals which do not show photoelectric effect when light of wavelength 310 nm falls on them are:

Which of the following is conclusively demonstrated by electron diffraction experiments?

In which year did Louis de Broglie propose the hypothesis that moving matter exhibits wave-like properties?

If an electron and a photon have the same de Broglie wavelength, which of the following properties will be identical for both?