Explanation Write the expression for the energy of each pulse. E p = P Δ t (I) Here, E p is the energy of a pulse, P is the power and Δ t is the time duration. Write the expression for the energy of one photon. E = h v = h c λ (II) Here, h is the Planck’s constant, c is the speed of light, λ is the wavelength and v is the frequency. Write the expression for total number of photons for each pulse. N = E p E (III) Conclusion: Substitute 0.63 W for P and 23 ms for t in equation (I) to find E p . E p = ( 0.63 W ) ( 23 ms × 10 − 3 s 1 ms ) = 14.49 × 10 − 3 J Substitute 6.63 × 10 − 34 J ⋅ s for h , 640 nm for λ and 3 × 10 8 m / s for c in equation (II) to find E

4th Edition

ISBN: 9780134112039

Author: GIANCOLI

Publisher: PEARSON

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Chapter 39, Problem 54P

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The amount of energy deposited per pulse and the number of photons each pulse contain.

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Chapter 39, Problem 53P

Chapter 39, Problem 55P

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