Question

what image is produced by placing an object 4 cm away from a convex lens of focal length of 8 cm​

Answer 1

Step-by-step explanation:

convex

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Answer 2

Answer:

In the convex lens

Object distance (u) = -4cm ( by the sign convention object distance is always negative)

Focal Length (f) = 8 cm( focal length of convex lens is positive)

Let,

Image Distance = v

By the lens formula

$1/v=1/f+1/u\\ = 1/8+1/-4\\ = -1/8$

Since the image distance is negative. Hence by the sign convention Image will be imaginary.