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Standard XII

Physics

Intensity Explanation in YDSE

Two monochrom...

Question

Two monochromatic (wavelength = $\frac{a}{5}$ ) and coherent sources of electromagnetic waves are placed on the x- axis at the points (2a, 0) and (–a, 0). A detector moves in a circle of radius R(>>2a) whose centre is at the origin. The number of maxima detected during one circular revolution by the detector are

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Solution

The correct option is A 60
$3 a c o s θ = n λ; 3 a c o s θ = n \frac{a}{5}; n = 15 c o s θ$
So, in one quadrant, there are 16 maxima and in total it is 64-4=60. Since 4 coincide at edges of quadrant.

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The correct option is A 603a cosθ=nλ; 3a cos θ=na5;n=15 cos θ So, in one quadrant, there are 16 maxima and in total it is 64-4=60. Since 4 coincide at edges of quadrant.

The correct option is A 60
$3 a c o s θ = n λ; 3 a c o s θ = n \frac{a}{5}; n = 15 c o s θ$
So, in one quadrant, there are 16 maxima and in total it is 64-4=60. Since 4 coincide at edges of quadrant.