What is the relationship between energy and frequency of light?

• A. Energy is inversely proportional to frequency.
• B. Energy is directly proportional to frequency.
• C. Energy is unrelated to frequency.
• D. Energy is independent of wavelength.

Answer: (B)

The relationship between energy and frequency of light is described by the equation (E = h \cdot f), where (E) is the energy of a photon, (h) is Planck's constant, and (f) is the frequency of the light. According to this equation, energy is directly proportional to frequency, meaning that as the frequency of light increases, the energy of the photons also increases.

This relationship highlights that higher frequency light, such as ultraviolet or X-rays, carries more energy than lower frequency light, such as infrared or radio waves. Thus, the correct answer accurately reflects this fundamental characteristic of light, showing that an increase in frequency results in an increase in energy. Understanding this concept is crucial in fields such as physics and photonics, as it plays a significant role in the interaction of light with matter.