Two coherent waves each of intensity I0 superpose in phase at a point. What is the resultant intensity there?
AI0 exactly
B2 I0 only
CI0 squared
D4 I0 in total
Answer & Solution
Correct answer: D. 4 I0 in total
Amplitudes add to 2E0, and intensity goes as the amplitude squared, giving 4I0.
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