Question

A ray of light is incident on a plane mirror along a vector i + j-k. The normal on incidence
point is along the vector i +). The unit vector along reflected ray is ê, = xi + y + zk. Find the
value of /
​

Answer 1

Answer:

fbfvxfjvxsuufvgvvgti

Answer 2

Answer:

Reflection of a ray of light is just like an elastic collision of a ball with a horizontal <br>ground. Component of incident ray along the inside normal gets reversed while the component<br>perpendicular to it remains unchanged.Thus ,the component of incident ray vector

parallel to normal , i.e.

gets reversed while perpendicular to it ,i.e,

remain unchanged <br>Thus , the reflected ray can be written as <br>

<br> :. A unit vector along the reflected ray will be <br>

<br> or,