Select the right word given in the table:
 
 A ray parallel to the principal axis
curved inwards
concave
 concave mirror
 Virtual images
A ray incident at the pole
negative
equal size image
energy
  
1. We can create enlarged, virtual images with .
 
2. passes through or appears to be coming from the principal focus after reflection.
 
3. Large mirrors are used to concentrate sunlight to produce heat in solar furnaces.