When α = 36 then L= 9cm ,27 cm,45 cm, 63cm ; when α = 60 then L= 15cm,45cm,75cm,105cm and when α = 92 then L= 23cm, 69cm, 115cm, 161cm. α is wavelength and L is the length of tubes.
What is wavelength?
In physics, wavelength is the spatial period of a periodic wave and the distance over which the shape of the wave repeats.
L=( 2n+1)* α/4
when α = 36
L= (2n+1) * 36/4
= (2n+1) *9
when n= 0,1,2,3
L= 9cm ,27 cm,45 cm, 63cm
when α = 60
L= (2n+1) * 60/4
= (2n+1) * 15
when n= 0,1,2,3
L= 15cm,45cm,75cm,105cm
when α = 92
L= (2n+1) * 92/4
= (2n+1) * 23
when n= 0, 1, 2,3
L= 23cm, 69cm, 115cm, 161cm
To know more about wavelength, refer
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