That is the definition of a lens
science mirror physics
if you are using A+ it is lens
A lens.
The law of reflection is valid for any ray of light. So it is also valid for curved and flat surfaces. For curved surfaces, the normal is taken as the normal to the tangent of the point where the light ray hits the surface.
A lens.
It's called a concave lens.
A lens is a piece of glass or other hard clear material molded with either one side flat and the other curved, or both sides curved. The curving side/s are to refract or bend light.
A lens
A lens
It's called a concave lens.
science mirror physics
Transparent objects can be seen due to their refractive index. Although light travels through them, the material that the object is made out of may change the speed of the light. With different shapes, curved surfaces for example, the light may be refracted or bent as it goes from air, through the transparent material, and out again. you don't really notice this on window panes as their flat shape does not cause the light to change direction noticeably.
a hexagonal prism has 0 curved surfaces
2 flat and 1 curved
2 flat surfaces unless it is rolled up in which case it has 2 curved surfaces.
A triangular prism contains zero curved and 5 flat surfaces.
5