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The concentration of photons in a uniform light beam with a wavelength of 500 nm is 1.7 × 1013 m-3 . The intensity of the beam is: 6.8 × 10-6 W/m2 3.2 × 102 W/m2 1.0 × 103 W/m2 2.0 × 103 W/m2 4.0 × 103 W/m2

The concentration of photons in a uniform light beam with a wavelength of 500 nm is 1.7 × 1013 m-3 . The intensity of the beam is: 6.8 × 10-6 W/m2 3.2 × 102 W/m2 1.0 × 103 W/m2 2.0 × 103 W/m2 4.0 × 103 W/m2

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The concentration of photons in a uniform light beam with a wavelength of 500 nm is 1.7 × 1013 m-3 . The intensity of the beam is: 6.8 × 10-6 W/m2 3.2 × 102 W/m2 1.0 × 103 W/m2 2.0 × 103 W/m2 4.0 × 103 W/m2

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The intensity of beam is defined as the power per unit area. Power is calculated by multiplying energy density and volume of photons. Energy density will be product of photon concentration and energy of photon. Energy of a photon is directly proportional to the frequency of photon i.e. inversely proportional to wavelength of photon and calculated using the formula E = hc/λ. Where h = planck’s constant, c = speed of light and λ = wavelength of photon.

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