An object 12cm high is placed 7.6cm in front of a convex mirror with a focal length of -14cm. What is the image height? Answer in units of cm.
Please help!
What is the image height?
2016-07-31 5:02 pm
回答 (1)
2016-07-31 5:12 pm
✔ 最佳答案
(1/u) + (1/v) = 1/f(1/7.6) + (1/v) = 1/(-14)
(1/v) = -(1/7.6) - (1/14)
v = -4.9
Image height
= (12 cm) × |v/u|
= 12 × (4.9/7.6) cm
= 7.7 cm
收錄日期: 2021-04-18 15:23:31
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