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1. What happens when the crests of two light waves superimpose on a surface? 2. What happens when a crest of one light wave superimposes

1. What happens when the crests of two light waves superimpose on a surface?

2. What happens when a crest of one light wave superimposes upon the trough of another light wave on a surface?

ANSWER CHOICES.

A- i) A dark spot ii) A dark spot

B- i) A bright spot ii) A bright spot

C- i) A bright spot ii) A dark spot

D- i) A dark spot ii) A bright spot

E- None of these.

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