Light of a single frequency from two coherent sources interferes to produce a pattern of bright and dark fringes on a screen.
A.
B.
C.
D.
Exam No：9702_s25_qp_13 Year：2025 Question No：31
Answer:
A
Knowledge points:
8.3.1 understand the terms interference and coherence
8.3.2 show an understanding of experiments that demonstrate two-source interference using water ripples, light and microwaves
8.3.3 understand the conditions required if two-source interference fringes are to be observed
8.3.4 recall and solve problems using the equation m = $\frac{ax}{n}$ for double-slit interference using light
Solution:
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