Question

By using Sun rays how u will find the focus and focal length Of convex mirror​

Answer 1

Answer:

C

Convex lens of focal length 20 cm.

Light rays from infinity are converged at the focal point of the convex lens. Therefore, the focal length of the convex lens is 20cm. Since the distance between the lens and screen where the image is converged is 20cm.

Hence, the correct option is C.

Answer 2

Answer:

Convex lens of focal length 20 cm.

Explanation:

Light rays from infinity are converged at the focal point of the convex lens. Therefore, the focal length of the convex lens is 20cm. Since the distance between the lens and screen where the image is converged is 20cm.

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