Here's why:
* Concrete Noun: When "light" refers to the electromagnetic radiation that makes things visible, it's a concrete noun. It's something tangible that we can experience through our senses. For example:
* "The light from the sun is bright."
* "Turn on the light so I can see."
* Abstract Noun: When "light" refers to a concept or quality like knowledge, understanding, or happiness, it's an abstract noun. It's an idea that we can't physically touch or see. For example:
* "She shed light on the problem."
* "He brought light to the world."
So, the type of noun "light" is depends on how it's used in a sentence.