WAEC - Chemistry (1997 - No. 1)
The phenomenon observed when dust particles collide randomly in a beam of sunlight is known as?
Tyndal effect
diffusion
osmosis
brownian movement
dialysis
คำอธิบาย
Tyndall effect, also called Tyndall phenomenon, scattering of a beam of light by a medium containing small suspended particles—e.g., smoke or dust in a room