A person claps near a canyon and hears the echo a few seconds later. How can the distance to the canyon be calculated, and what principle is used?
کھائی کے قریب تالی بجانے پر چند سیکنڈ بعد بازگشت سنائی دیتی ہے۔ کھائی تک فاصلہ کیسے نکالا جائے اور کون سا اصول استعمال ہوگا؟
Solution & explanation
Measure the round-trip delay t and use the sound speed v for the conditions. Total travel is vt, so distance to the reflecting surface is d = vt/2.
Independent study answer. Original textbook ↗ · English-medium printed page 60–61.