Question

solve this example
plz​

Answer 1

Given

frequency = 300hz

Wavelength = 100 angstroms

E = Hv

So

Energy = 6.63*10^-34 *300 =19.89*10^-32j

Answer 2

E = hc/lamda

E = 6.63*10^-34 *3*10^8/10^-8m

E = 6.63*10^-18

Hope it helps you ✌️