PROBLEM TO BE SOLVED: To provide a study tool permitting to simply and easily study that angles of incident and reflection are equal to each other and a study tool for creating an animation by utilizing a composition of the former tool. ;SOLUTION: This study tool comprises a bottom wall 9, a disk 5 pivoted on the bottom wall, a side wall consisting of a cylindrical wall 4, an outer wall 1 and a sectional wall 2, a reflection plate 6, and a rotation means permitting to freely set an angle of the disk 5, and is provided with holes 3a, 3b on the side walls for light to be made incident therethrough on a shaft center of the disk 5 from the outside of the side wall and is also provided with a scale of angle on the disk 5, so that the incident light reflected by the reflection plate 6 is projected to the inside of the side wall as projected light, and thus, it is made possible to read angles of incidence and reflection on the reflection plate 6. Further, it is also made possible to see an animation (a comic strip) through the holes 3a, 3b from outside associated with a rotary action of the disk 5 by providing a plurality of frames of images showing a continuous action on the inside of the cylindrical wall.;COPYRIGHT: (C)1998,JPO
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