Answer:
Step-by-step explanation:
Microwaves are a type of electromagnetic radiation, and their energy is directly related to their frequency. In general, microwaves with higher frequencies have higher energy values.
In this case, the frequency of 680 MHz is higher than the frequency of 450 MHz, so the microwave with a frequency of 680 MHz has a higher energy value. This means that the microwave with a frequency of 680 MHz has more energy per photon than the microwave with a frequency of 450 MHz.
It is important to note that the difference in energy between microwaves of different frequencies can be quite small. In general, the energy of microwaves is much lower than that of other types of electromagnetic radiation, such as visible light or X-rays.