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Two waves having an intensity ratio 16 ∶ 9 produce interference. These will have the ratio of maximum and minimum intensities as-

  1. 7 ∶ 1
  2. 49 ∶ 1
  3. 16 ∶ 9
  4. 4 ∶ 3

Answer (Detailed Solution Below)

Option 2 : 49 ∶ 1

Detailed Solution

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Concept:

The maximum intensity of interference of two waves of intensities I1 and I2 is given as 

The minimum intensity of interference of two waves of intensities I1 and I2 is given as 

Calculation:

Given intensities rato is 16 : 9

We can say that

So,

So, the ratio is 

I max : I min = 49 :  1

The correct option is 49 : 1

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