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Good evening sir... How did we write equation 1, 2. 18n= l . & 16(n+1)=l . How sir explain it

Good evening sir...
How did we write equation 1, 2.
18n= l . &
16(n+1)=l .
How sir explain it

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1 Answers

Venkat
273 Points
2 years ago
Fact: the distance between ends of a fixed string is one half-wavelength. Hence, the relation is
 
\lambda_n=\frac{2l}{n} \\l=(\frac{\lambda_n}{2})n
Consider above fact that length is half of lambda n. Hence,(\frac{\lambda_n}{2}) = 18 and 16 for second equation.
So for equation (1) ,  l = 18n,
 
Second equation, For consective nodes (or n+1)
l = 16(n+1)
 

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