Q. डॉप्लर प्रभाव सम्बन्धित है ?

(A) मुद्रा प्रचलन
(B) ध्वनि
(C) मनोविज्ञान
(D) जनसंख्या

✅ Correct Answer: (B) ध्वनि

Published by Krishna Sharma ⭐ 48.52K Points at 07-Mar-2021 10:11 am in Science

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