The energy of a photon of wavelength $λ$ is
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → $\frac{hc}{λ}$
The energy of a photon is given by:
$E = h\nu$
where $h$ is Planck's constant and $\nu$ is the frequency of light.
Since, $\nu = \frac{c}{\lambda}$,
$E = h \frac{c}{\lambda}$
∴ Energy of a photon: $E = \frac{hc}{\lambda}$