A converging lens has a focal length of 20 cm. An object 1 cm tall is placed 10 cm from the center of the lens. What is the height of the image? (note: solve for the image distance first)
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Ответ:
2 cm
Explanation:
Given , for a converging lens
Focal length :
Height of object :
Object distabce from lens :
Using lens formula: , we get
, where v = image distance from the lens.
On solving aboive equation , we get
Formula of Magnification : , where h' is the height of image.
Put value of u, v and h in it , we get
Hence, the height of the image is 2 cm.
Ответ: