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Pleas solve this question as soon as possible. The answer is 4.94

Pleas solve this question as soon as possible. The answer is 4.94
 

Question Image
Grade:12

1 Answers

Arun
25763 Points
3 years ago
look, the distance between two points is given as 15cm.
Draw a figure with two waves.
take 3 vertical lines with amplitude 3.5mm (there are total 4 actually - take first 3)
The distance between 2nd and 3rd line is 15cm. Half of it will give the distance between 2nd line and the node- whicch is 7.5cm.
Now the distance between first and second line is 15cm again. So half of wavelength is 15 + 7.5*2 = 30cm
Total wavelength is 60cm.

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