1 00:00:01,199 --> 00:00:24,260 materials materials first light passes easily throws it the consequence is that we can cannot 2 00:00:24,260 --> 00:00:33,520 see the object but we can see through it we say that the object is transparent 3 00:00:33,520 --> 00:00:54,179 Second, some light passes through it. The consequence is that we can see through the object and we can partially see through it. We say the object is translucent. 4 00:00:54,179 --> 00:01:15,180 The third step cannot pass through it at all, the consequence is that we can see the object but he cannot see through it, we say that the object is opaque. 5 00:01:15,180 --> 00:01:29,379 Opaque object can both absorb and reflect light totally or partially online the light that is reflected. 6 00:01:30,219 --> 00:01:32,359 Let's use see the object. 7 00:01:33,680 --> 00:01:34,659 The end.