The distance between davids image and mirror is 4m what is the distance between david and his image if he moves 2m away from the mirror?

In the case of a plane mirror, the distance between the object and the mirror (d₁) is same as the distance between the image and the mirror (d₂).

Given,

Distance between the image and David = d1 +  d₂ = 4 m

Therefore, d₁ = d₂ = 2 m

If David moves 2 m away from the mirror, then d₁ = 2 + 2 = 4 m

Again, d₁ = d₂ = 4 m

Therefore, the distance between David and his image is d₁ + d₂ = 4 + 4 = 8 m.

Regards

Arun (askIITians forum expert)