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What happens with radiowaves?
If that was true Scientist a laser light 'propagating' through water or glass would have no directionality.
light... will have a direction inside the substance consistent with the 'path' originally created
now question arises about transparent materials. Simple explanation about it is, there is much more gap between two atoms of transparent materials.
Scientist: what happens in mirrors?? How angle of incidence is equal to angle of reflection?? And why it is in single plane??