## anonymous one year ago Calculate the wavelength of a photon of energy 5.518 × 10-26 joules. (Planck's constant is 6.626 × 10-34 joule seconds, the speed of light is 2.998 × 108 m/s)

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1. JFraser

this is a two-step problem, and they've given you both constants you need. The $$energy, \space E$$ of a wave is directly proportional to its $$frequency, \space \nu$$. $E = h*\nu$The $$speed, \space c$$, of that same wave is also related to its frequency and its wavelength, $$\lambda$$. $c = \lambda * \nu$ Use the energy equation and plank's constant to find the frequency, then plug that frequency into the wavelength equation to solve for the wavelength