Physics
Physics
Problem
The work function ( ) of some metals is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metal is: (IIT 2011)| Metal | Li | Na | K | Mg | Cu | Ag | Fe | Pt | W |
| (ev) | 2.4 | 2.3 | 2.2 | 3.7 | 4.8 | 4.3 | 4.7 | 6.3 | 4.75 |