A crow is sitting on a branch of a tree and on ground surface wheat grains are spread. The crow flies towards the ground and picks up a grain and sit on the front wall. The possible path are shown in diagram. Choose the correct path so that path length becomes minimum.
Given that BD = DE, ∠AFB = ∠EFC.
Answer & explanation
Correct answer: option 3
Light takes shortest path hence AFC' = AFC.