How does altering the frequency of a signal affect its energy?

The correct choice highlights a fundamental relationship in physics, specifically in the context of electromagnetic waves and their energy. According to the principles of quantum mechanics, the energy of a photon, or light particle, is directly proportional to its frequency. This relationship is described by the equation ( E = h \cdot f ), where ( E ) is energy, ( h ) is Planck's constant, and ( f ) is frequency.

When the frequency of a signal is increased, it indicates that the number of oscillations per second is higher, which translates into greater energy. This is crucial in various applications, including telecommunications, where higher-frequency signals can carry more information and exhibit different properties compared to lower-frequency signals.

Therefore, as the frequency increases, so does the energy associated with that signal, confirming that higher frequency generally indicates higher energy. This principle is essential for understanding how different frequencies can affect the behavior of signals in electronic systems.