https://www.robloxdev.com/api-reference/datatype/Ray
https://www.robloxdev.com/api-reference/function/Workspace/FindPartOnRay
https://www.robloxdev.com/api-reference/function/Workspace/FindPartOnRayWithIgnoreList
https://www.robloxdev.com/api-reference/function/Workspace/FindPartOnRayWithWhitelist
These functions are pretty much the most common use case for even using the Ray datatype so it would make sense for the Ray API page to link to them as related articles