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1. |
In a photoelectric effect experiment the threshold wavelength of light is 380 nm. If the wavelength of incident light is 260 nm, the maximum kinetic energy of emitted electrons will be:Given E (in eV) \(=\frac{{1237}}{{\lambda {\rm{\;}}\left( {in{\rm{\;}}nm} \right)}}\) |
A. | 1.5 eV |
B. | 3.0 eV |
C. | 4.5 eV |
D. | 15.1 eV |
Answer» B. 3.0 eV | |