光會吾會有慣性?

Q: 光有冇慣性?
"Inertia"(慣性) is a property of matter (or mass). Light has no mass, hence does not possess any inertia.

Q: 光有冇質量?
No. Light has no rest mass.

Q:光會吾會靜止?
No. Light, which is electromagentic waves in nature, travels at a constant speed ( 300 000 km/s) in vacuum.

Q:光佔有空間嗎?
Light, being a form of energy, exhibites its existence when there is space. Light (photons) were produced immediately after the "Big Bang" together with the creastion of space. There is space, there is light.