What is the energy of photon whose wavelength is 6840 Å?

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What is the energy of photon whose wavelength is 6840 Å?

Options

(a) (1.81 eV)
(b) (3.6 eV)
(c) (-13.6 eV)
(d) (12.1 eV)

Correct Answer:

(1.81 eV)

Explanation:

λ = 6840 Å
.·. ʋ = c / λ ⇒ hʋ = hc / λ
If hc = 12400 eV Å
Energy of the photon = 12400eV Å / 6840 Å
= 1.81 Å

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Topics: Dual Nature of Matter and Radiation (150)
Subject: Physics (2479)

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