Question

1. A concave lense of focal length 15cm forms an image 10cm from the lens. how far is the object placed from the lense? draw the Ray diagram


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Answer 1

Given: f=−15

v=−10

From mirror formula,

v

1

−

u

1

=

f

1

−10

1

−

u

1

=

−15

1

u

1

=

15

1

−

10

1