URL:https://1.bp.blogspot.com/-wd59bK99MfE/XwMkIZ2tEAI/AAAAAAAAJOo/MpKOaLUCX4sT2rkwjse1CUvDQxrZ-xhfwCK4BGAsYHg/s3000/bigstock-Reflection-Ray-Scheme-Vector--346215070.jpg
掲載元:http://www.moomoomathblog.com/2020/07/specular-and-diffusion-reflection-how.html