Chemistry - Atomic Structure Question with Solution | TestHub

In a photoelectric experiment the stopping potential is 0.80 V for light of wavelength 400 nm and 1.83 V for light of wavelength 300 nm. Using these data, the value of Planck's constant, in units of $10^{-34}Js$(up to two decimal places), is $(e=1.6\times 10^{-19}$ C, $c=3\times 10^{8}m/s)$