Question

What is the position of image when an object is placed at a distance of 10 cm from a convex lens of focal length 10cm.



Plz solve this question.

Answer 1

Hey!

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Focal length (f) = 15 cm
Distance of object from the convex mirror (u) = 10 cm
Image distance (v) = ?


1/v - 1/u = 1/f

1/v - 1/10 = 1/15

1/v = 1/5 + 1/10

1/v = 2 + 3 / 30

1/v = 5/30

1/v = 1/6

v = 6 cm
Image distance = 6 cm

Image distance is in positive, thus the image is formed behind the mirror, thus it's VIRTUAL and ERECT.