Question

13. What is the photon energy associated with visible light with a wavelength of 4.25x10^-7 m?
(Your answer will be in eV)

Answer 1

$\\ \sf\bull\longmapsto E=hv$

$\\ \sf\bull\longmapsto E=\dfrac{hc}{\lambda}$

$\\ \sf\bull\longmapsto E=\dfrac{6.626\times 10^{-34}Js\times 3\times 10^8ms^{-1}}{4.25\times 10^{-7}m}$

$\\ \sf\bull\longmapsto E=\dfrac{19.878\times 10^{-26}Jm}{4.25\times 10^{-7}m}$

$\\ \sf\bull\longmapsto E=4.677\times 10^{-19}J$

$\\ \sf\bull\longmapsto E=4677\times 10^{-16}J$

$\\ \sf\bull\longmapsto E=4677eV$