Correct option (D) x = d – f, y = – f θ
Explanation :
After Ist reflection (from plane mirror)
Parallel beam of light strick on a concave mirror.
After IInd reflection (from concave mirror)
Image is formed at focus and shifted by a distance f θ (⟂ to principal axis)
For IIIrd reflection
Object is placed at a distance | f.d| from a plane mirror.