If two light waves each of amplitude a travelling a travelling through a medium arrive at a point in opposite phase then the resultant amplitude R at

Question

If two light waves each of amplitude a travelling a travelling through a medium arrive at a point in opposite phase then the resultant amplitude R at

If two light waves each of amplitude a travelling a travelling through a medium arrive at a point in opposite phase then the resultant amplitude R at that points is
A. `R=0`
B. `R=a`
C. `R=2a`
D. `R=4a`

Monjur Alahi

4 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 - A
`a_(1)= a_(2)= a and alpha_(1)-alpha_(2)= pi, R=?`
`R= sqrt(a_(1)^(2)+a_(2)^(2)+2a_(1) cos (alpha_(1)-alpha_(2)))`
`=sqrt(a^(2)+a^(2)+ 2 a_(1)a_(1) cos pi)`
`R =0`

4 views Answered 2023-02-05 15:29