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# Nitrogen Laser Produces a Radiation at a Wavelength of 337.1 Nm. If the Number of Photons Emitted is 5.6 × 1024, Calculate the Power of this Laser - CBSE (Science) Class 11 - Chemistry

#### Question

Nitrogen laser produces a radiation at a wavelength of 337.1 nm. If the number of photons emitted is 5.6 × 1024, calculate the power of this laser.

#### Solution

Power of laser = Energy with which it emits photons

Power = E = (Nhc)/lambda

Where,

N = number of photons emitted

h = Planck’s constant

Substituting the values in the given expression of Energy (E)

E = ((5.6xx20^(24))(6.626xx10^(-34) Js)(3xx10^8 ms^(-1)))/(337.1xx10^(-9)m)

= 0.3302 × 107 J

= 3.33 × 106 J

Hence, the power of the laser is 3.33 × 106 J.

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Solution Nitrogen Laser Produces a Radiation at a Wavelength of 337.1 Nm. If the Number of Photons Emitted is 5.6 × 1024, Calculate the Power of this Laser Concept: Wave Nature of Electromagnetic Radiation.
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