Understanding the Relationship

* Energy and Frequency: The energy of a photon is directly proportional to its frequency. This relationship is described by Planck's equation:

E = h * f

Where:

* E = energy of the photon (in Joules)

* h = Planck's constant (approximately 6.63 x 10^-34 J*s)

* f = frequency of the photon (in Hertz)

Calculation

1. Rearrange the equation to solve for frequency:

f = E / h

2. Plug in the given values:

f = (6.80 x 10^-25 J) / (6.63 x 10^-34 J*s)

3. Calculate the frequency:

f ≈ 1.03 x 10^9 Hz

Answer: The frequency of a radar photon with an energy of 6.80 x 10^-25 J is approximately 1.03 x 10^9 Hz.