Areal object 4.0 cm high stands 30.0 cm in front of a converging lens of focal length 23 cm. a) find the image distance. b) find the image height. c) is the image real or virtual? explain in detail. d) is the image erect or inverted? explain in detail.

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray