HSC Science (General) 12th Board ExamMaharashtra State Board
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# Find the Wave Number of a Photon Having Energy of 2.072 Ev - HSC Science (General) 12th Board Exam - Physics

ConceptEinstein’s Equation - Particle Nature of Light

#### Question

Find the wave number of a photon having energy of 2.072 eV

Given : Charge on electron = 1.6 x 10-19 C,

Velocity of light in air = 3 x 108 m/s,

Planck’s constant = 6.63 x 10-34 J-s.

#### Solution

E = hv

:.v=E/h

v=C/lambda

∴ Wave number

1/lambda=v/c

=E/(hc)

=(2.072xx1.6xx10^(-19))/(6.63xx10^(-34)xx3xx10^8

=1/lambda=1.667xx10^6m^(-1)

Is there an error in this question or solution?

#### APPEARS IN

2013-2014 (March) (with solutions)
Question 5.8 | 2.00 marks

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Solution Find the Wave Number of a Photon Having Energy of 2.072 Ev Concept: Einstein’s Equation - Particle Nature of Light.
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