6. in an experiment with photoelectric effect, it was found that the stopping potential decreases from 1.8 vo 0.82 v as the wavelength of the incident light is

6. In an experiment with photoelectric effect, it was found that the stopping potential decreases from 1.8 VO 0.82 V as the wavelength of the incident light is varied from 300 nm to 400 nm. Calculate the value ot tne Planck's constant from this data. Ans. 6.6x103 Js