What is the energy of an electromagnetic wave with the frequency of 8 and times10 to the 12th power HZ?

The energy of an electromagnetic wave can be calculated using the equation E = hν, where E is energy, h is Planck's constant (6.626 x 10^-34 J·s), and ν is frequency. Plugging in the values: E = (6.626 x 10^-34) x 8 x 10^12 = 5.301 x 10^-21 Joules.