A concave lens has a focal length 15 cm. If the object is placed at 30 – McqOptions

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1.	A concave lens has a focal length 15 cm. If the object is placed at 30 cm from the lens, what is the image distance?
A.	-20 cm
B.	-10 cm
C.	-15 cm
D.	-18 cm
Answer» C. -15 cm

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