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Calculate the total energy carried by ten photons when a photon has a frequency of 23Hz. |
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Answer» Explanation: You use either the formula E = h f or E = h λ . Explanation: h is Planck's Constant, f is the frequency, c is the speed of LIGHT, and λ is the WAVELENGTH of the RADIATION. EXAMPLE 1 Calculate the energy of a photon of radiation whose frequency is 5.00 × 10 14 Hz . SOLUTION 1 E = h f = 6.626 × 10 − 34 J ⋅ s × 5.00 × 10 14 s − 1 = 3.31 × 10 − 19 J The energy is 3.31 × 10 − 19 J . EXAMPLE 2 Calculate the energy of a photon of radiation that has a wavelength of 3.3 µm. Solution 2 E = h c λ = 6.626 × 10 − 34 J ⋅ s × 2.998 × 10 8 m⋅s − 1 3.3 × 10 − 6 m = 6.0 × 10 − 20 J Here's a video on how to find the energy of a photon with a given wavelength. |
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