Common JEE Mistakes in Waves

Common JEE Mistakes in Waves

### Mistake 1

Confusing particle velocity with wave velocity.

### Correct Relation

$$v_{wave}\neq v_{particle}$$

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### Mistake 2

Changing frequency during refraction.

### Correct Relation

$$f=constant$$

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### Mistake 3

Using wrong harmonic relation for closed pipe.

### Correct Relation

$$f_n=(2n-1)\frac{v}{4L}$$

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### Mistake 4

Ignoring phase reversal during reflection.

### Correct Relation

Dense medium reflection:

$$\Delta\phi=\pi$$

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