Final answer:
The energy of light is based on its frequency and wavelength, not its brightness, making the statement that energy differs between dim and bright light false.
Step-by-step explanation:
The energy of light is determined by its frequency and wavelength, not by its brightness. The statement 'Energy of a dim light and bright light are different' is false. In the context of the photoelectric effect, it is the energy of individual photons that matters, which is determined by their frequency (or equivalently, their wavelength), not the number of photons or their brightness. Brighter light simply has more photons (higher intensity), but the energy of each photon remains dependent on frequency. Therefore, a dim blue light may have higher energy photons than a bright red light, for instance. This misunderstanding likely arises from a confusion between the concepts of brightness (intensity) and energy (frequency or wavelength) of light.