A child looks at a reflecting christmas tree ball that had a diameter of 9.0 cm and sees and image of her face that is half the real size . How far is the child 's face from the ball ?
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Question :–
A child looks at a reflecting christmas tree ball that had a diameter of 9.0 cm and sees and image of her face that is half the real size. How far is the child's face from the ball ?
Answer :–
The child face far from the ball is
Given :–
- Diameter = 9.0cm
To Find :–
- How far is the child's face from the ball ?
Solution :–
Let,
p = distance of face to ball
q = distance of virtual image to ball
r = Radius of ball = 4.5cm
So,
- By Eq. 23.4, M
- By Eq. 23.3
Hence,
The child face far from the ball is
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