Question

The type of lens used in a simple microscope is

• A. Binocular lens
• B. Plano concave lens
• C. Concave-convex lens
• D. Convex lens

Answer 1

The correct option is D

Convex lens

Explanation for correct options:

1. A convex lens of short focal length can be used to see the magnified image of a small object.
2. $Principle:$ When a small object is placed between the optical center and the focus of a convex lens, the virtual, erect, and magnified image is formed on the same side of the lens

Explanation for incorrect Options:

1. Binocular lenses use a convex lens for both the objective and eyepiece lenses. It enables an inverted image to appear upright.
2. Plano - Concave lenses have one concave surface and one flat surface. These lenses are used to diverge the light.

Hence the correct option is (D) Convex lens.