A wave enters to water from air. In air frequency, wavelength, intensity and velocity are n 1 , λ λ 1 , I 1 and v 1 respectively. In water the corresponding quantities are n 2 , λ λ 2 , I 2 and v 2 respectively; then:
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B
When a wave enters from one medium to another, its frequency remains unchanged, i.e. n 1 = n 2 but wavelength, intensity and velocity get changed.
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