Image Formation by Lenses

 
6.3  Image Formation by Lenses
 
 

Characteristics of image

  • Enlarged
  • Diminished
  • Same size
  • Inverted
  • Upright
  • Virtual
  • Real
 

Lenses

  1. There are 2 types of lenses, namely the

    • Convex lens

    • Concave lens

  2. Light rays passing through a convex or converging lens are bent towards the principal axis, whereas rays passing through a concave or diverging lens are bent away from the principal axis.

 
  Linear magnification, m  
  Ratio of image height to object height (no unit)  
     
  \(m=\dfrac{h_i}{h_o}\), where \(h_i = \) image height,  \(h_o = \) object height  
     
  \(m=\dfrac{v}{u}\), where \(v =\) image distance, \(u=\) object distance  
     
 
 

 

Image Formation by Lenses

 
6.3  Image Formation by Lenses
 
 

Characteristics of image

  • Enlarged
  • Diminished
  • Same size
  • Inverted
  • Upright
  • Virtual
  • Real
 

Lenses

  1. There are 2 types of lenses, namely the

    • Convex lens

    • Concave lens

  2. Light rays passing through a convex or converging lens are bent towards the principal axis, whereas rays passing through a concave or diverging lens are bent away from the principal axis.

 
  Linear magnification, m  
  Ratio of image height to object height (no unit)  
     
  \(m=\dfrac{h_i}{h_o}\), where \(h_i = \) image height,  \(h_o = \) object height  
     
  \(m=\dfrac{v}{u}\), where \(v =\) image distance, \(u=\) object distance