defence exam SSB Head Constable (Communication) 2023 Mock Test Physics Dual Nature: Photon and Matter Waves Einstein’s Photoelectric Equation
The work function of a photosensitive material is 4.0 eV. The longest wavelength of light that can cause photon emission from the substance is (approximately)
1
31 nm
2
310 nm
3
3100 nm
4
966 nm