Question

An object is 5 cm in front of a diverging lens of focal length 10 cm. The image is :

	A.	Real and larger than the object
	B.	Real and the same size as the object
	C.	Real and smaller than the object
	D.	Virtual and smaller than the object
	E.	None of the above

Answer 1

Use the lens formula for diverging lens using the given focal length and object distance to find the image distance and use that to find the required solution as shown below

for a deverging lens, image image is always Virtual and smaller than the object 1 di 1 do 11 1 f > 1 1 1 -10cm di (-5cm) =) di = -3-33cm dico, so image is real, di -3.33 do 3.33 m יו = c < 1 So, it's smaller than the object.