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Q. No.A ray of light is incident on a mirror which is lying on the \(x-y\) plane. The reflected ray travels along the direction of the vector \(3\hat i-4\hat j+2\hat k.\) The incident ray must be along:
1. \(-3\hat i+4\hat j+2\hat k\)
2. \(3\hat i-4\hat j-2\hat k\)
3. \(-3\hat i-4\hat j+2\hat k\)
4. \(-3\hat i+4\hat j-2\hat k\)
1. \(-3\hat i+4\hat j+2\hat k\)
2. \(3\hat i-4\hat j-2\hat k\)
3. \(-3\hat i-4\hat j+2\hat k\)
4. \(-3\hat i+4\hat j-2\hat k\)
Subtopic: Â Reflection at Plane Surface |
From NCERT
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Two plane mirrors are inclined at \(70^\circ.\) A ray incident on one mirror at an angle, \(\theta\) after reflection falls on the second mirror and is reflected from there parallel to the first mirror. The value of \(\theta\) is:
1. \(45^\circ\)
2. \(30^\circ\)
3. \(55^\circ\)
4. \(50^\circ\)
1. \(45^\circ\)
2. \(30^\circ\)
3. \(55^\circ\)
4. \(50^\circ\)
Subtopic: Â Reflection at Plane Surface |
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From NCERT
NEET - 2013
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