The value of plank's constant is : -

The value of the Plank's constant 'h' in erg -s is ______.

If the value Plank's constant is more than its present value. Then de Brolie wavelength associated with a material particle will be

In a photocell circuit the stopping potential, V_0 , is a measure of the maximum kinetic energy of the photoelectrons. The following graph shows experimentally measured values of stopping potential versus frequency v of incident light. The values of Planks constant and the work function as determined from the graph are (taking the magnitude of electronic charge to be e= 1.6 xx 10^(-19)C )

Write approx. value of plank's constant and permittivity constant

Einstein got Nobel prize in physics in 1921 for his explanation of photoelectric effect. Draw a graph to show the variation of stopping potential with frequency of incident radiation. How the value of Plank.s constant can be deter mined from the graph?

If the unit of length be doubled in a new system of units then, numerical value of h (plank's constant) becomes [E = hv]