Question: Vectors. Thanks. A light ray I with direction vector - hits a surface with normal o The reflected ray is r. n= O r -

Vectors. Thanks.

A light ray I with direction vector - hits a surface with normal o The reflected ray is r. n= O r - i) The negative vector of 1 isa . Find a . ii) a is resolved into 2 vectors a, which is parallel to n and a, which is perpendicular to n . Find a, and az . iii) Hence find r. ans: i) a =i-j+k , ii) a, =i+k, a, =-j, iii) r=i+j+k

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