Correct Answer - Option 3 : hc/Eg
The correct answer is option 3) i.e. hc/Eg
CONCEPT:
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Energy band: An energy band is a representation of the energy levels possessed by the electrons in an isolated atom.
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Photon energy (E) of electromagnetic waves is given by the equation: \(E = \frac{hc}{λ}\)
Where c is the speed of light, λ is the wavelength of electromagnetic wave, and h is Planck's constant (6.626 × 10-34 m2 kg s-1)
CALCULATION:
Given that:
Energy of bandgap, E = Eg
The wavelength of emitted light = λ
Since light is an electromagnetic wave, its photon energy, \(E = \frac{hc}{λ}\)
Eg = \(\frac{hc}{λ}\) ⇒ λ = hc/Eg
