railway RRB Technician Grade 3 Mock Test 2024 General Science Physics Wave

खालीलपैकी कोणता प्रभाव ध्वनी लहरींवर आढळत नाही?

1
ध्रुवीकरण
2
अपवर्तन
3
हस्तक्षेप
4
विवर्तन
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