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Match the following
List - 1 List - 2
A) Doppler effect I) Velocity of stars
B) Beats II) Loudness of sound
C) Echo III) Standardisation of frequency
IV) Depth of the oceans
A B C
1) IV I II
2) III I IV
3) IV II III
4) I III IV

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answer is D.

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Detailed Solution

Doppler effect is used to determine Velocity of stars.

Concept of Beats is used for Standardization of frequency.

Echo is used to determine Depth of the oceans.

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