A positive lens has a focal length of 7 cm. An object is located 32 cm from the lens.?

A positive lens has a focal length of 7 cm. An object is located 32 cm from the lens.





(a) How far from the lens is the image?


____cm


(b) Is the image real or virtual, erect or inverted?


virtual, inverted


real, inverted


real, erect


virtual, erect


(c) Trace three rays from the top of the object to confirm your result.

A positive lens has a focal length of 7 cm. An object is located 32 cm from the lens.?
a) 1/do + 1/di = 1/f


f=7, do=32.


So the answer works out to be 8.96cm





b) Anything placed outside the focal point for converging lens is inverted and real, so it's 2.





c) Draw it past the focal point on both sides of the lens and one through the lens. Sorry, not much help here.

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