However, we can speculate on how it might work based on the description in the books:
* Magical Energy: The most likely explanation is that the wand draws upon magical energy, similar to other spells in the wizarding world. This energy is channeled through the wand's core and directed to create a light source.
* Luminescent Properties: The wand could contain a core made of a highly luminescent material, similar to phosphorescent or fluorescent substances. The magic might activate this material, causing it to glow.
* Enchantment: The wand could be enchanted with a spell specifically designed to produce light. This spell could be activated by a flick of the wrist or a simple verbal command.
It's important to remember that these are just theories. The actual mechanism of the illuminating wand remains a mystery, as with many aspects of the magical world in Harry Potter.