Question

The ray diagram could be correct

• A. If $n_1=n_2=n_3$
• B. If $n_1=n_2$ and $n_1<n_g$
• C. If $n_1=n_2$ and $n_1>n_g$
• D. Under no circumstances

Answer 1

Answer: (C)

If $n_1>n_g$ then the lens will be in more dense medium. Hence its nature will change and the convex lens will behave like a concave lens.