Question

(ii) A divergent lens has a focal length of 30 cm. At what distance should an

object of height 5 cm from the optical centre of the lens be placed so that its image

is formed 15 cm away from the lens? Find the size of the image also.

(ii) Draw a ray diagram to show the formation of image in the above situation. plzplz answer am writing test thatsy plz answer me fast ​

Answer 1

Explanation:

that's the answer for this question

Answer 2

Answer:

We know that for a divergent lens both u and f are -ive , from lens equation

v=

u+f

uf

, as both u and f are -ive therefore v will be -ive ,

given f=−30cm,v=−15cm ,

so u=

f−v

fv

=

−30−(−15)

−30×−15

=−30cm ,

now linear magnification m=I/O=v/u ,

given height of object O=5cm,I=? ,

therefore I/5=15/30 ,

or I=5×15/30=2.5cm please follow me back