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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)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A system consists of three masses m₁, m₂ and m₃ connected by a string passing
- The mean free path of electrons in a metal is 4 x 10⁻⁸ m. The electric field
- The half-life of radioactive element is 600 yr. The fraction of sample
- In an inductor when current changes from 2 A to 18 A in 0.05 sec, the e.m.f. induced
- A wire having resistance 12Ω is bent in the form of an equilateral triangle.
Topics: Dual Nature of Matter and Radiation (150)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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