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QJEEM20Ph4797: JEE Main 2020 Physics - Class 11 JEEM20Ph4797 Solution: For a transverse wave travelling along a straight line, the…

For a transverse wave travelling along a straight line, the distance between two peaks (crests) is 5 m, while the distance between one crest and one trough is 1.5 m. The possible wavelengths (in m) of the are :

Multiple Choice Options

  • A 1, 3, 5, .....
  • B 11,13,15, .....
  • C 1, 2, 3, .....
  • D 12,14,16,

Step-by-Step Verified Solution

1.5=(2n1+1)λ2 ......(1)

5 = n2λ .....(2)

(1) ÷ (2)

1.55=(2n1+1)2n2

⇒ 3n2 = 10n1 + 5

n1 = 1 ; n2 = 5 ⇒ λ = 1

n1 = 4 ; n2 = 15 ⇒ λ = 1/3

n1 = 7 ; n2 = 25 ⇒ λ = 1/5

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