Question

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

Answer 1

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

Explanation:

The energy of a photon is given by

$E= \frac{h c}{\lambda}$

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 $E= \frac{6.626\times 10^{-34}\times 3\times10^{8}}{538\times10^{-9}}$

E=3.69 x 10⁻¹⁹ J