What happens to the image distance and size of the image , when an object is moved from infinity to the optical centre of a bi- convex lens ?
Answers
Answer:This may help you
Explanation:
1)When object is at infinity- Image formed at focus. Real ,inverted and extremely small.
2)When object is near to centre of curvature- Image formed between focus and centre of curvature. Real, inverted and small in size than object size.
3)When object is on centre of curvature- Image formed at centre of curvature. Real, inverted and same size as object size.
4)When object is between centre of curvature and focus-Image formed beyond centre of curvature. Real inverted and larger in size.
5)When object is on focus- Image formed at infinity. Real, inverted and extremely large.
6)When object is between focus and optical centre- Image formed is virtual and can be seen in the lens only. Erect and magnified.
Points to remember-
1} As object moves towards focus, image moves away from focus.
2} As object moves towards focus, image grows in size but remains inverted.
3} As object moves between focus and optical centre, image decreases in size virtually as distance from the lens decreases.
When an object is placed between optical center and focus of a convex lens virtual , erect and enlarged image is formed . For concave lens,image formed is virtual, erect and diminished image is formed.
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