Final answer:
The smallest quantum of energy from a blue light source is a blue photon, which is a packet of energy with a higher frequency and energy compared to red or green light.
Step-by-step explanation:
The smallest single quantum of energy produced by a source emitting blue light is called a photon. Photons are packets of energy characterized by their wavelength, and thus, they are also associated with a color. The energy of a photon is directly related to its frequency and inversely to its wavelength. Because blue light has a shorter wavelength (and hence a higher frequency) than red or green light, it is associated with higher energy photons. Given that the colors of visible light span from red to violet, blue photons will have more energy than red and green photons but less than violet photons.
Type A) Blue Photon is therefore the correct answer, as blue light emanates from blue photons, which are indeed energy packets emitted or absorbed by atoms and molecules at specific quantized energies.