If the object is placed between infinity and optical centre O of the concave lens, how will the image be formed after refraction?

Question

Question

This question was previously asked in

RRB JE Previous Paper 3 (Held On: 22 May 2019 Shift 1)

Answer 1

CONCEPT:

The transparent curved surface which is used to refract the light and make an image of any object placed in front of it is called a lens.
The lens whose refracting surface is upside is called a convex lens and the lens whose refracting surface is inside is called a concave lens or diverging lens.
- Concave lenses diverge light rays and hence are also called diverging lenses.

Positions of the object and image:

F1 Savita Teaching 19-7-24 D10 F1 Savita Teaching 19-7-24 D11

Position of the object	Position of the image	The relative size of the image	Nature of the image
1. At infinity	At focus F₁	Highly diminished, point-sized	Virtual and erect
2. Between infinity and optical center O of the lens	Between focus F₁ and optical center O	Diminished	Virtual and erect

EXPLANATION:

When the object is between the infinity and optical center of the lens then the image forms between focus and optical center which is diminished, virtual and erect. So option 1 is correct.