2. Calculate the energy in joules of a photon whose frequency is 7.55*1014 Hz.

The energy of a photon is given by

E = h * v

where:

E is the energy in joules/photon

'h' is the constant 6.63 * 10⁻³⁴

'v' is the frequency 7.55 * 10¹⁴

Substitute 'h' and 'v' into the formula we have

E = (6.63*10⁻³⁴) * (7.55*10¹⁴)

E = (6.63*7.55) * (10⁻³⁴ * 10¹⁴)

E = 50.0565 * 10 ⁽⁻³⁴⁺¹⁴⁾

E = 50 * 10⁻²⁰ joules/photon