Page 262 - text book form physics kssm 2020

Table 6.7 and Table 6.8 show ray diagrams as well as characteristics of images for convex
lens and concave lens respectively.
Table 6.7 Formation of image by convex lens
Characteristicscssss
Object position Ray diagram Image position
of image

Object at infinity • Image distance: • Real
v = f • Inverted
F F • Image at F • Diminished

I

Object O beyond 2F • Image distance: • Real
(u 2f ) O f v 2f • Inverted
F 2F • Image between • Diminished
2F F F and 2F
I

Object O at 2F • Image distance: • Real
(u = 2f ) O v = 2f • Inverted
F 2F • Image at 2F • Same size as
object
2F F
I

Object O between F • Image distance: • Real
and 2F O v 2f • Inverted
( f u 2f ) F 2F • Image beyond 2F • Magnified
2F F

I

Object O at F • Image at infinity • Virtual
(u = f ) • Upright
O
F 2F • Magnified
2F F

Object O between F I • Image distance: • Virtual
and optical centre v u • Upright
(u f ) • Magnified
O
F
F

256
256 6.3.3
6.3.3