Question

Draw the ray diagram to show the formation of image by a convex lens when
the object is kept between 2F, and F, (F, : Principal focus of the convex lens)​

Answer 1

In the attached diagram,

★ The object is placed between 2F₁ and F₁

★ The image is formed beyond 2F₂

★ The image is highly enlarged, real and inverted.

Extra points

• The object is always placed towards the left of the mirror.
• There are 2 types of lens. They are concave lens and convex lens.
• As seen in the diagram, the image is highly enlarged.
• 2F is the length which is equal to twice the focal length.
• In convex lens, rays pássing parallel to the principal axis will pàss through second principal focus after refraction.