Question

the energy of a photon corresponding to the maximum wavelength of visible light is?

Answer 1

$energy = \frac{hc}{ a}$
where h is Planck's constant=6.626×10^-34 m/s. me and c is speed of light and a is maximum wavelength of visible light which is 8000A°. 8000A°=8×10^3×10^-10=8×10^-7 m. Energy=6.626×10^-34(3×10^8)/8×10^-7
=>Energy =19.878×10^-25/8×10^-7
=>Energy=2.48475×10^-18J.