Asked: R.A.S./R.T.S. (Pre) 2007medium Level
QUESTION STATEMENT:द्विभाषी / Bilingual
ध्वनि के स्रोत व परावर्ती सतह के बीच न्यूनतम कितनी दूरी होनी चाहिए, जिससे कि प्रतिध्वनि स्पष्ट रूप से सुनाई दे सके?
What should be the minimum distance between the sound source and reflecting surface so that an echo is clearly heard?
SELECT CORRECT OPTION:
A
10 मीटर
10 meters
B
17 मीटर
17 meters
Correct
C
24 मीटर
24 meters
D
30 मीटर
30 meters
Official Solution & Explanation:
Correct Answer: Option B(17 मीटर)
स्पष्ट प्रतिध्वनि सुनने के लिए ध्वनि स्रोत तथा परावर्तक सतह के बीच की न्यूनतम दूरी लगभग 17 मीटर (16.5-17.2 मीटर) होनी चाहिए।
To hear a distinct echo, the minimum distance between the sound source and the reflecting surface must be approximately 17 meters (calculated as $(340\text{ m/s} \times 0.1\text{ s})/2 = 17\text{ m}$).
Subject: General Science•Topic: Sound / Acoustics•Subtopic: Sound / Acoustics
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