00:01
In this problem, we are going to discuss that why we cannot see our image when we look at a flat, rough aluminum surface.
00:08
So, remember what we have said, that the surface is rough, and secondly, the surface is flat.
00:15
So, when we say that surface is rough, that means at the microscopic level, the surface is rough.
00:21
So flat means when we look it macroscopically, that is, when we look it with our naked eyes, then it will look flat.
00:28
But in fact it is a rough surface.
00:33
So there is an aluminum plate or something, aluminum utensil or anything made up of aluminum and it has flat rough surface.
00:42
Now we cannot see our images on that particular thing.
00:46
So why is that? which phenomena is responsible for not showing our face? so the phenomena behind this can be understood with the help of two different laws.
00:58
So, first one is law of reflection and second one is the concept of regular reflection and diffuse reflection.
01:08
Laws of reflection says that light will make the same incident and reflected angle for a light being a light ray falling onto a surface, right? and it says that all the three points will lie on the same plane, that is incident point and then plane and then the reflected point.
01:27
So, here we have another concept of regular and diffuse reflection.
01:31
So, actually, this is the main concept that is responsible for such kind of behavior of aluminum, uh, aluminum, uh, stuff.
01:42
So we can say that regular deflection, sorry, regular reflection and diffused reflection are two things are two things that are very, uh, helpful to understand this very problem...