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If the path difference must be an integral multiple of wavelength...

ECAT Engineering Exams Quizzes MCQs Quizzes ECAT Engineering Entry Test 2017 Physics Physical Optics 1

Question:
If the path difference must be an integral multiple of wavelength

Option A):
D Sin θ = λ /m
Option B):
D Sin θ = m/λ
Option C):
Sin θ = md/λ
Option D):
D Sin θ = mλ

Correct Answer is Option D):
D Sin θ = mλ

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