Question

pls solve this question
worth 100 Points

the focal length of the convex lens is and the wrong observation is​

Answer 1

Answer:

Concave lens beam light

Answer 2

Answer:

This means that both u and v must be equal to twice the focal length of the convex lens. Focal length of the convex lens = 30/2 = 15cm. (b)The observation (v) is incorrect. For this observation u = 15 = /, i.e., the object is at the focus and the image must be formed at infinity and not 70 cm.