Which phenomenon is responsible for the echo of sound wave? (1) Reflection (2) Refraction (3) Interference (4) Polarization

Which phenomenon is responsible for the echo of sound wave? (1) Reflection (2) Refraction (3) Interference (4) Polarization
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(1) Reflection Explanation: Reflection of sound waves off of surfaces lead to one of two phenomena - an echo or a reverberation. The echo is produced due to hitting of the sound waves with the obstacles which makes the Sound to reflect back. Echoes occur when a reflected sound wave reaches the ear more than 0.1 seconds after the original sound wave was heard.
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Which phenomenon is responsible for the echo of sound wave? (1) Reflection (2) Refraction (3) Interference (4) Polarisation

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Description : What is the phenomenon which established the transverse nature of light ? (1) Reflection (2) Interference (3) Diffraction (4) Polarisation

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Description : The phenomenon which causes mirage is (1) Interference (2) Diffraction (3) Polarisation (4) Total internal reflection

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Optical fibres are based on the phenomenon of (1) Interference (2) Dispersion (3) Diffraction (4) Total Internal Reflection

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