Light rays that pass or appear to pass through the _______ are reflected by the curved mirror parallel to the principal axis.   principal focus   pole   center of curvature   Hint Half-n-half Clue   If the object is placed at the principal focus in front of a concave mirror, the image formed is _______.   inverted   diminished   also at the principal focus   Half-n-half Clue   Light rays that pass through the _______ are reflected back by the curved mirror along the same path.   center of curvature   principal focus   pole   Half-n-half Clue   If the height of an object is 4 cm and the height of its image is 16 cm, then the magnification is _______ times.   ¼   4   20   12   Half-n-half Clue   When the object is at infinity in the case of a concave mirror, the image formed is _______.   real   enlarged   at the center of curvature   Half-n-half Clue