Home › JEE Main › Physics › Dual Nature of Radiation and Matter › Threshold wavelength for a metal with work funct…
Threshold wavelength for a metal with work function 3 eV:
AAbout 413 nm (= 1240/3)
B100 nm
C1240 nm
D700 nm
Answer & Solution
Correct answer: A. About 413 nm (= 1240/3)
λ₀ = hc/φ = 1240/3 ≈ 413 nm. Below this wavelength (= higher frequency) photoemission occurs.
Related questions
The de Broglie hypothesis of matter waves supports the stationary orbits of:The wave nature of electrons was confirmed by Davisson and:De Broglie was awarded the Nobel Prize in Physics in:De Broglie was a physicist of which nationality?Who proposed the idea of matter waves in 1924?In a photon-particle collision, what may not be conserved?Photon energy is independent of the radiation's:Increasing the intensity of light of a given wavelength increases the: