cavity resonator

A resonator is a device or system that exhibits resonance or resonant behavior. Many objects that use resonant effects are referred to simply as resonators. Examples of resonators are discussed in this article. An electromagnetic cavity resonator is a resonator composed of a space that is usually surrounded by a dielectric that uses resonance to select a specific band of frequencies.
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Noun
1. a hollow chamber whose dimensions allow the resonant oscillation of electromagnetic or acoustic waves
(synonym) resonator, resonating chamber
(hypernym) chamber
(hyponym) soundbox

B: (Fisika) penalun (resonator) rongga
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Eng: cavity resonator
Urdu: جوفی گمکیا ۔ برقی اہتزازات ایک لچھے اور مکثفے والے اہتزازی دور ۔