Final answer:
The average energy, kBT, associated with each mode of electromagnetic radiation confined in a cavity is described by the Rayleigh-Jeans Law. It states that the average energy of a mode is directly proportional to the temperature of the cavity.
Step-by-step explanation:
The Rayleigh-Jeans Law describes the average energy, kBT, associated with each mode of electromagnetic radiation confined in a cavity. According to this law, the average energy of a mode is directly proportional to the temperature of the cavity. It is given by the equation E = kBT, where E is the average energy, kB is Boltzmann's constant, and T is the temperature of the cavity.
For example, let's consider a cavity at a temperature of 300K. By substituting this value into the equation, we can calculate the average energy of each mode. The value of Boltzmann's constant is 1.380 × 10-23 J/K. Therefore, the average energy, kBT, associated with each mode would be (1.380 × 10-23 J/K) * (300 K) = 4.14 × 10-21 J.
The average energy, kBT, associated with each mode of electromagnetic radiation confined in a cavity is described by the Rayleigh-Jeans Law. It states that the average energy of a mode is directly proportional to the temperature of the cavity.