True: A convex mirror is used as a rearview mirror. , A concave mirror is used by the dentist with the object between focus and the pole. , The far point is infinity for an adult eye. , False: The power of the convex lens is negative. , Luminous objects do not emit light. , White light is not composed of any color. ,

Physics Light

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？