Questions and answers by

Lis znz

Answers (1)

E=mc(T2-T1) =>0.25×4200(100-80) =8400J Now,to find N, no of photons E=Nhc/wavelength => N=E×wavelength) /hc N=(8400×0.125)/hc =5.27×10^28 Therefore, the photons were 5.27×10^28

Ask a New Question