Calculate the energy of the orange light emitted, per photon, by a neon sign with a frequency of 4.89 * 1014 hz.

The energy if of a photon is (Planck's Konstant) x (frequency).

Planck's Konstant is 6.62607004 * 10⁻³⁴ m²-kg/s.

So the photon's energy is

(6.626 * 10⁻³⁴ m²-kg/s) x (4.89 x 10¹⁴ / sec)

= (32.4 x 10⁻²⁰) m²-kg/s²

= 3.24 x 10⁻¹⁹ joule