If you did not get to see the real inverted image projected
on the card for the concave mirror, please look at it today.

CONCAVE SPHERCIAL MIRROR (east side):  The location of
the focal point (F) and of the center of curvature (C)
are marked on the floor.  

 Use your hand as an object; when your hand is inside the
 focal point, you should observe an upright virtual image;
 it gets smaller as the object moves towards the mirror.

 When your hand is outside the focal point, the image is
 real and inverted; its get smaller as the object moves
 away from the mirror.

 Confirm the reality of the image for objects outside the
 focal point by placing a white card at a distance of about
 20 cm outside the focal point.  You should be able to see
 an image of the bright lamp on the mirror side of the card.

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