I. Coherence
II. Same frequency
III. Same wavelength
IV. Same Intensity
Which of the conditions above are necessary to produce interference fringes?
- I and III
- I, II and IV
-
I, II and III
- II and III
The correct answer is: C
Explanation
The necessary conditions to produce interference fringes are I (Coherence), II (Same Frequency), and III (Same Wavelength). Condition IV (Same Intensity) is not necessary.
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