Multiple choice

When can a convex lens act as a diverging lens?

  1. When two convex lens are placed side by side.

  2. When lens is in a liquid whose refractive index is greater than refractive index of material of lens.

  3. When a convex lens is placed behind a concave lens.

  4. When lens is in vacuum.

  5. When lens is in a liquid whose refractive index is less than refractive index of material of lens.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Yes, when lens is immersed in a liquid whose refractive index is greater than refractive index of material of lens then it will change its nature and become concave lens and thus it will start diverging the rays rather than focusing them on a single point.

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