Physics · Sound
स्पष्ट प्रतिध्वनि सुनने के लिए किसी व्यक्ति को परावर्तक सतह से न्यूनतम कितनी दूरी पर खड़ा होना चाहिए (वायु में ध्वनि की गति लगभग 344 m/s मानकर)?
- 19.4 cm
- 217.2 cm
- 317.2 m✓
- 49.4 m
सही उत्तर देखें
17.2 m
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