Question

A concavr lens of focal length 15 cm from an image of 10 cm from the lens then how far object is placed from lens? draw ray diagram




please slove it correctly




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Answer 1

Answer:

Explanation:

30 cm on the same side as the image formed

1/f = 1/v -1/u

-1/15 = -1/10 -1/u

solve it you get the answer

hope this helps

Answer 2

Question

A concavr lens of focal length 15 cm from an image of 10 cm from the lens then how far object is placed from lens? draw ray diagram

Answer: u=30 cm

FORMULA USED:$\frac{1}{f}=\frac{1}{v}+\frac{1}{u}$

given

Focal length f=15 cm

distance of image,v= -10cm

SOLUTION

we know that

⇒$\frac{1}{f}=\frac{1}{v}+\frac{1}{u}$

⇒1/-15=1/-10+1/u

⇒-1/u=1/-15+1/10

⇒-1/u=1/30

⇒u=-30

HOPE THIS HELPS U!