Jee Main
Structure Of Atom
JEE Main 2023 (Online) 12th April Morning Shift
Values of work function (W\(_0\)) for a few metals are given below
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| Metal | Li | Na | K | Mg | Cu | Ag |
|---|---|---|---|---|---|---|
| W\(_0\)/eV | 2.42 | 2.3 | 2.25 | 3.7 | 4.8 | 4.3 |
The number of metals which will show photoelectric effect when light of wavelength \(400 \mathrm{~nm}\) falls on it is ___________
Given: \(\mathrm{h}=6.6 \times 10^{-34} \mathrm{~J} \mathrm{~s}\)
\(c=3 \times 10^{8} \mathrm{~ms}^{-1}\)
\(e=1.6 \times 10^{-19} \mathrm{C}\)