Here's why:
* "Terrestrial" means related to Earth.
* "Light" refers to electromagnetic radiation within the visible spectrum.
It's possible someone might be using "terrestrial light" to refer to:
* Light emitted from Earth: This could include artificial lights from cities, light pollution, or even bioluminescence from organisms.
* Light reflecting off Earth: This would be sunlight reflected from land, water, clouds, or even ice and snow.
To understand the intended meaning of "terrestrial light," you need more context.
If you can provide more information about where you encountered this phrase, I can help you decipher its meaning.
