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Standard IX

Physics

Light Spectrum

Two monochrom...

Question

Two monochromatic (wavelength $= a / 5$ ) and coherent source of electromagnetic waves are placed on the x-axis at the point $(2 a, 0)$ and $(- a, 0)$ . A detector moves in a circle of radius $R (>> 2 a)$ whose Centre is at the origin. The number of maximas detected during one circular revolution by the detector are:

60

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15

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64

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None

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Solution

The correct option is A $60$
Given wavelength=a/5, therefore, 3a =15(wavelength) . This corresponds to maxima. ∆x=0 implies maxima. Similarly in three other quadrants we will get 14 maxima. Therefore total = 60

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The correct option is A 60Given wavelength=a/5, therefore, 3a =15(wavelength) . This corresponds to maxima. ∆x=0 implies maxima. Similarly in three other quadrants we will get 14 maxima. Therefore total = 60

The correct option is A $60$
Given wavelength=a/5, therefore, 3a =15(wavelength) . This corresponds to maxima. ∆x=0 implies maxima. Similarly in three other quadrants we will get 14 maxima. Therefore total = 60