Answer:
[tex]f=4.12\times 10^{14}\ Hz[/tex] and [tex]E=2.73\times 10^{-19}\ J[/tex]
Explanation:
The wavelength of a visible light is 727.3 nm.
[tex]727.3\ nm=727.3 \times 10^{-9}\ m[/tex]
The formula is as follows :
[tex]c=f\lambda[/tex]
f is the frequency of the visible light
[tex]f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{727.3 \times 10^{-9}}\\\\f=4.12\times 10^{14}\ Hz[/tex]
Energy of a photon is given by :
E = hf, h is Planck's constant
[tex]E=6.63\times 10^{-34}\times 4.12\times 10^{14}\\\\E=2.73\times 10^{-19}\ J[/tex]
Red color has a frequency of [tex]4.12\times 10^{14}\ Hz[/tex] and energy per photon is [tex]2.73\times 10^{-19}\ J[/tex].
