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

Question

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

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 cm
B. 3 cm
C. 2 cm
D. zero

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

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`

5 views Answered 2023-02-05 15:29