Answer:
Energy, [tex]E=2.92\times 10^{-19}\ J[/tex]
Explanation:
Given that,
The wavelength of a light is [tex]6.8\times 10^2\ nm[/tex]
We need to find the energy of light. The formula for the energy of light is given by :
[tex]E=\dfrac{hc}{\lambda}\\\\E=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{6.8\times 10^2\times 10^{-9}}\\\\E=2.92\times 10^{-19}\ J[/tex]
So, the energy of a light is [tex]2.92\times 10^{-19}\ J[/tex].
