Explanation Write the expression for the photon energy. E min = n h c λ Here, E min is the minimum energy, n is the number of photons, h is the Planck’s constant, c is the speed of light , and λ is the wave length. Rewrite the above expression in terms of n. n = E min λ h c (I) Conclusion: Substitute 10 − 18 J for E min , 550 nm for λ , 6.63 × 10 − 34 J ⋅ s for h , and 3.00 × 10 8 m / s for c in (I) to find n

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Chapter 37, Problem 14P

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The number of photons lead to an observable flash.

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Chapter 37 Solutions

PHYSICS FOR SCIEN & ENGNR W/MOD MAST

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Chapter 37 Solutions