MPSC Rajyaseva 2016 GS Paper 1 — Question 52
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खालील विधानांचा विचार करा : वरीलपैकी कोणते विधान सत्य आहेत ? Consider following statements : Which of the above statements are true ?
(a)दाट धुके असलेल्या रात्री दूरवरून जाणाऱ्या आगगाडीची शिट्टी स्पष्टपणे ऐकू येते. The whistle of a passing train is clearly heard on a quiet misty night.
(b)ध्वनिचा हवेतील वेग हा हवेच्या आद्रतेच्या समानापाती असतो. Velocity of sound in air is proportional to humidity in air.
On a misty night, sound waves refract due to temperature gradients making distant sounds clearer, and the velocity of sound increases directly with air humidity.
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