Sonar — finding distance with echoesसोनार — प्रतिध्वनि से दूरी ज्ञात करना

NCERT Fig 10.28 · interactive diagram

Parts and their functions

• Ship with sonar (सोनार वाला जहाज़) — Sonar = sound navigation and ranging. It sends and receives ultrasonic waves.
• Ultrasonic pulse sent (भेजी गई पराश्रव्य तरंग) — Frequency above 20 kHz; travels far in water (light does not).
• Object (submarine, wreck, sea bed) (वस्तु (पनडुब्बी, मलबा, समुद्र तल)) — Reflects the ultrasound back.
• Reflected wave (echo) (परावर्तित तरंग (प्रतिध्वनि)) — Time t is for the round trip — to the object AND back.
• Distance d = v t / 2 (दूरी d = v t / 2) — Example 10.6: 1530 × 0.90 ÷ 2 = 688.5 m.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 10.28. Report a mistake