Question

calculate the energy of 100photons if tje wavelength of the light is 2000A

Answer 1

Frequency (μ)=Cλ (wave length)

= (3×108meters/sec)/(2000×10−10meters)

= 1.5×1015sec−1

Energy =hμ

= (6.63∗10−34Joule.Sec).1.5×1015sec−1

Energy =9.94×10−19 Joule

Energy of 100 photon =9.94×10−19×100Joule=9.94×10−17 Joule