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(a) Derive an expression for unit vector along reflected ray (hat r) if unit vectors hat i and hat n represents unit vectors along incident light ray and normal (at point of reflection and outward from surface) respectively. (b) If vector along the incident ray on a mirror is -2 hat i+ 3 hat j + 4 hat k. Considering the x-axis to be along the normal. Then, find the unit vector along the reflected ray. |
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Answer» `rArr 2 HAT (i)+ 3 hat (j) + 4 hat (k)` `:.` it's unit vector `= (2 hat(i)+3 hat(j)+4 hat(k))/(SQRT(29))`. |
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