Two light waves superimposing at the mid-point of the screen are coming from coherent sources of light with phase difference 3p rad. Their amplitudes are 1 cm each. The resultant amplitude at the given point will be.A. 5 cmB. 3 cmC. 2 cmD. zero

Two light waves superimposing at the mid-point of the screen are comin

1.	Two light waves superimposing at the mid-point of the screen are coming from coherent sources of light with phase difference 3p rad. Their amplitudes are 1 cm each. The resultant amplitude at the given point will be.A. 5 cmB. 3 cmC. 2 cmD. zero
Answer» Correct Answer - D Resultant amplitude, `A=sqrt(A_(1)^(2)+A_(2)^(2)+2A_(1)A_(2)cos phi)` Here, `A_(1)=A_(2)=1cm,phi=3pi`rad ` :. A=sqrt(I^(2)+I^(2)+2xx1xx1xxcos3pi)=sqrt(2+2xx(-1))=0`

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Two light waves superimposing at the mid-point of the screen are coming from coherent sources of light with phase difference 3p rad. Their amplitudes are 1 cm each. The resultant amplitude at the given point will be.A. 5 cmB. 3 cmC. 2 cmD. zero

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