39can u please show your working whihc led u to state that
Is the ans all vlues of "a" frm 0 to 90???
If two plane mirrors are placed perpendicular to each other , if a ray of light falls at an angle "a " with the plane of one mirror. Find the value of "a" so that reflected ray becomes parallel after reflection from second mirror?
Is the ans all vlues of "a" frm 0 to 90???
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7 Answers
39
1
Clearly as angle PAM= angle MNB,
the rays are parallel for any acute value of 'a'
1did any1 notice "light falls at an angle "a " with the plane of one mirror"????
1but avinav,that wont matter would it,given the fact that the 2nd reflection is possible.
the only thing it could have done is made the reflection from the 2nd mirror not possible.
considering the reflection in the plane in which it happens,we get the same result!