Physics · BGCSE / Thermal physics
Multiple choicePast exam questionForm 5 · BGCSE
Pollen grains are suspended in a liquid and a bright light is shone on them. When observed under a microscope, the pollen grains are seen to be in continuous random motion. What is the reason for this observation?
Source: BEC BGCSE Physics 2022, Paper 1, Question 10
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