Question

a candle is placed in front of a convex lens at a distance more than twice of the focal length (whose focal length of the lens is f )and is slowly moved towards the lens. Now complete the following chart with :- position of candle, psition of image, size and nature of image, use​

Answer 1

Answer:

Candle is placed very near to the lens i.e in between optic centre and Focus F1 then the image size is ENLARGED

nature of image: Virtual and erect

Explanation:

(i) Candle is placed more than twice of its focal length

Position of image: in between F2 and 2F2

Size : Diminished (Small)

Nature: Real and Inverted

(ii) Candle is placed at F1

Position of image: At F2

Size : Same as object

Nature: Real and Inverted

(iii) Candle is placed in between F1 and 2F1

Position of image: Beyond 2F2

Size: Enlarged

Nature: Real and Inverted

(iv) Candle is placed at F1

Position of image: At infinity

Size: Highly Enlarged

Nature : Real and Inverted

(v)Candle is placed very near to the lens i.e in between optic centre (O) and Focus (F1)

Position of image: Same side of the lens as the object

Size : ENLARGED

Nature: Virtual and erect