To study reflection in concave mirror
1)A parallel beam of light falls on a mirror. All the rays of the beam after reflection, actually intersect at a point. The mirror is a 
  

2)A virtual, erect and magnified image is formed by a concave mirror when the object is 
  

3)A ray of light strikes the concave mirror parallel to principal axis. After reflection from the mirror :
  

4)An object is kept at the center of curvature (C) of a concave mirror, the position and size of image formed is: 
  

5)The imaginary line passing through the center of curvature and the pole of the mirror is called : 
  


  


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