The wavelength of one line in the emission spectrum of c is 538 nm. what is the energy of one photon with this wavelength?

The energy of this photon = 3.69 x 10⁻¹⁹ J

Explanation:

The energy of a photon is given by

h= Planck's constant= 6.626 x 10⁻³⁴ J s

c= velocity of light= 3 x 10⁸ m/s

λ= wavelength= 538 nm= 538 x 10⁻⁹ m

so

E=3.69 x 10⁻¹⁹ J

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