posted by Jon on .
1)Specular reflection obeys the laws of reflection while diffuse reflection does not.
False. drwls said its true but I disagree can you please explain.
2)A convex lens is used to obtain an enlarged virtual image.
1) The answer depends upon what you call the "laws" of reflection. The angle of incidence is NOT equal to the angle of reflection, for a diffuse reflector.
I explained my answer before. Light that is diffusely reflected is reflected at many angles, not just one. That is why images cannot be seen in a diffuse reflector, such as a piece of paper.
2) "True" is correct sometimes, such as with a magnifying glass, but convex lenses can also form real images. In a refracting telescope, one convex lens can be used as the objective to form a real image and a second (eyepiece) convex lens can form a virtual image of the first image.
Simple convex lenses, and especially plano convex lenses, are seldom used in optical systems such as cameras and telescopes because their image-forming properties are relatively poor.