Concave Mirrors

The concave mirror is the inside of the spherical surface is the reflecting surface.
The characteristic of concave mirror to collect of rays or CONVERGEN
The cut point of focusing reflected rays mentioned FOCUS LENGTH
The parts of concave mirror

 

Explainations of the above figure

C   =  center of mirror curve or radius of curvature

F   =the mirror focal point or focal length

V   = the mirror vertex

FV  = the distance of mirror focal length 

CV =The mirror radius

The principle rays of concave mirror

1. A ray parallel to the mirror axis is reflected passes through the focal point of a concave 

     mirror 

2. A ray that passes through the focal point of concave mirror is reflected parallel to the mirror axis

3. A ray that proceeds along a radius of the mirror is reflected back along its original path.

 

Characteristics of an Image in Concave Mirrors

1. Position of object is beyond C 

 

Characteristic of image :  

• Real
• Inverted
• Smaller 
• Image formed between C and F

 1. Sketch - rays diagram and mention characteristic of an image in concave mirror if the position of object
      there are  at  :
      a. Centre of curvature (C)
      b. Between C and focal point (f)
      c. Focal length 
      d. Inside focal length
      e. Infinity