Question

how is the lens capability related to its focus distancehow is the lens capability related to its focus distance find the capacity of concave lens if the focus distance 50 cm ​

Answer 1

Answer:

Explanation:

Distance of object from the mirror u=−50u=-50u=−50 cm

Distance of image from the mirror v=−10v=-10v=−10 cm

For lens, we know

1f=1v−1u\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}f1​=v1​−u1​

1f=1−10−1−50\dfrac{1}{f}=\dfrac{1}{-10}-\dfrac{1}{-50}f1​=−101​−−501​

f=−12.5cmf=-12.5cmf=−12.5cm