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Question
Fig. shows three ways in which a string of length l in an instrument can vibrate.
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 |
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| (i) | (ii) | (iii) |
- Which of the diagram shows the principle note?
- Which vibration has the frequency four times that of the first?
- Which vibration is of the longest wavelength?
- What is the ratio of the frequency of the vibration in (i) and (ii)?
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Solution
- (i) represents the principal note.
- (iii) has the frequency four (4) times of the first.
- In Figure (i), vibration is of the longest wavelength.
- Ratio of frequency between (i) and (ii) 1 : 2
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