Home › CBSE Class 11 › Chemistry › Atomic combinations › Per NCERT §photoelectric effect, which of the fo…
Per NCERT §photoelectric effect, which of the following classical predictions does the photoelectric effect VIOLATE?
ALight cannot eject electrons
BBelow the threshold frequency ν₀, NO electrons are ejected — regardless of intensity. Classical theory predicted intensity alone should suffice
CElectrons are not ejected at all
DElectrons gain mass on ejection
Answer & Solution
Correct answer: B. Below the threshold frequency ν₀, NO electrons are ejected — regardless of intensity. Classical theory predicted intensity alone should suffice
Per NCERT §photoelectric, even very intense red light fails to eject from K if ν < ν₀; weak yellow light succeeds. Classical EM said brightness alone should matter — falsified.
Related questions
The strength of a bond depends chiefly on the extent of:Sidewise overlapping produces charged clouds shaped like a:In a pi bond, the axes of the overlapping orbitals remain:Head-on overlap along the internuclear axis is also called:A sigma bond is formed by overlap that is:In a molecule such as HF, the covalent bond is:A bond where the electron pair sits exactly between identical nuclei is:The nitrogen bond enthalpy of 946 kJ per mol is one of the: