A diagram of a triangular prism with a right angle and a left angle. The prism is divided into two sections, with the left side being a light blue color and the right side a darker blue color. The right side of the prism is a darker shade of blue and has a diagonal line running through it. There are two red arrows pointing towards the left and right sides of the image, one on each side, indicating the direction of the light. The arrows are labeled with the letters "b", "h", and "a".
User drmanuode uploaded the image
User drmanuode uploaded the image
