ECAT Engineering Exams Quizzes MCQs Quizzes ECAT Engineering Entry Test 2017 Physics Physical Optics 2

Question:
If the two reflected waves reinforce each other then the film as seen from the parallel beam of monochromic light will look

Option A):
Sometimes bright and dark
Option B):
Bright
Option C):
Dark
Option D):
None of these

Correct Answer is Option B):
Bright