Visible light falls into wavelength ranges of 400-700 nm, for which 1 m=1×109 nm The energy and wavelength of light are related by the equation E=hcλ where E is energy in Joules, h is Planck's constant ( 6.626×10−34 J-s ), c is the speed of light ( 2.998×108 m/s), and λ is the wavelength in m. If a visible light photon has a wavelength of 632.3 nm, what is the energy of the photon (in J)?

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