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Sound — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsSound1 Mark
MCQ
Modern super sonic war planes use the principle of ________ while detecting their targets.
  • ✓
    echo
  • B
    SONAR
  • C
    reverberation
  • D
    none of these
✓

Answer

Correct option: A.
echo
(a)
echo
Explanation:
Super sonic war planes use radar, employing the echo principle with radio-waves to detect and track targets by reflecting waves off them.

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