If threshold wavelength for sodium is 6800Å then the work function will be

If the threshold wavelength for sodium is 5420 Å , then the work function of sodium is

The thresold wavelength of sodium meta is 6800 overset @A . the work function is:

If the threshold wavelength for a certain metal is 2000Å , then the work function of the metal is

The threshold wavelength of a metal is 1243 nm its work function will be

Work function of tungsten and sodium are 4.4 eV and 2.3 eV respectively . If threshold wavelength of sodium is 5460 Å , then the threshold wavelength of tungsten is

If the threshold wavelength for a certain metal 3000Å , then the work function of the metal is