Lithium has a work function of 2.3ev. If 400nm light is incident on it, what is the maximum kinetic energy ? Chemistry Bohr Model of the Atom Calculations with wavelength and frequency
No. A comma precedes such as when what follows is an example of whatever went before. In this case, it is nonrestrictive. (For nonrestrictive constructions: use a comma.).
Date marks such as âdisplay untilâ or âsell byâ often appear near or next to the âbest beforeâ or âuse byâ date. These are instructions for shop staff, not for shoppers. The important dates for you to look for are the âuse byâ and âbest beforeâ dates.