Two plane mirrors M₁ and M₂ are at right angle to each other as shown. A point source P is placed at a and 2a meter away from M₁ and M₂ respectively. The shortest distance between the images thus formed is (Take √5=2.3)

Question

Accepted Answer

(3) 4.6a. Take the corner as origin, P=(a,2a). Image in M₁: I₁=(-a,2a). Image in M₂: I₂=(a,-2a). I₁I₂=√(2a)²+(4a)²=2√5 a=4.6a

Two plane mirrors M₁ and M₂ are at right angle to each other as shown. A point source P is placed at a and 2a meter away from M₁ and M₂ respectively. The shortest distance between the images thus formed is (Take √5=2.3)

Step-by-step solution

Why the other options are wrong