Question

Calculate the energy of 100 photons if the wavelength of the light is 2000 amstrong

Answer 1

Answer:

The energy of 100 photon is E=9.94\times 10^{-17}\ J

Explanation:

Number of photons, n = 100

Wavelength of light, \lambda=2000\ A=2000\times 10^{-10}\ m

Energy of the photon is given by :

E=\dfrac{hc}{\lambda}

E=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{2000\times 10^{-10}}E=9.94\times 10^{-19}\ J

The energy of 100 photon will be, E=100\times 9.94\times 10^{-18}\ J

E=9.94\times 10^{-17}\ J