Question

- उत्तल लेंस का प्रयोग करते हुए अवतल लेंस की फोकस दूरी ज्ञात करें।​

Answer 1

Answer:

uttar lens ka prayog karte hue avtal lens ka focus ki duri gyat kar sakte hain

Answer 2

Given:

Focal length of concave mirror.

To find:

To find the focal length of a concave lens using a convex lens.

Explanation:

See the image attached below and find

Observed u by finding the difference of position of L2 and I.

Observed v by finding the difference of position of L2 and I’.

Corrected values of u and v are obtained by applying index correction.

We use the lens formula in this experiment to calculate the focal length of the concave lens:

f=$\frac{uv}{u-v}$

Where,  

f is the focal length of the concave lens L1

u is the distance of I from the optical center of the lens L2

v is the distance of I’ from the optical center of the lens L2.

From sign convention, the f obtained from the above formula will be negative as v > u and u – v is negative.

From this process we can find the focal length of a concave lens using a convex lens.

To learn more...

1)Explain how a convex lens behaves as converging lens and as diverging lens​

https://brainly.in/question/14630741

2)The focal length of convex lens is 50 cm. if an object kept at the distance of 75 cm from the lens then find the image distance and magnification produced by the lens.

https://brainly.in/question/15539805