The wave length of Red light in the visible region is about 760 nm the energy of photon in that case will be:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 1.64 eV
To calculate the energy of the photon (E),
$E=\frac{hc}{λ}$
where,
λ = Wavelength = 760 nm = $760×10^{-9}m$
$E=\frac{(6.63×10^{-34})(3×10^8)}{760×10^{-9}}$
$≃1.64eV$