You are trying to photograph a bird sitting on a tree branch, but a tall hedge i

Question

You are trying to photograph a bird sitting on a tree branch, but a tall hedge is blocking your view. However, as the drawing shows, a plane mirror reflects light from the bird into your camera. If x = 4.3 m and y = 3.5 m in the drawing. For what distance must you set the focus of the camera lens in order to snap a sharp picture of the bird's image?

According to the homework help, the answer is 7.29m. Can someone explain how they came to that answer? Thanks

You are trying to photograph a bird sitting on a tree branch, but a tall hedge is blocking your view. However, as the drawing shows, a plane mirror reflects light from the bird into your camera. If x = 4.3 m and y = 3.5 m in the drawing. For what distance must you set the focus of the camera lens in order to snap a sharp picture of the bird's image? According to the homework help, the answer is 7.29m. Can someone explain how they came to that answer? Thanks

Explanation / Answer

D=sqrt((4.3+2.1)^2+3.5^2)
=7.29 m

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