This is the two-part seminar I gave in college on my book that is being published. Hope you like it, although a lot of the information was delivered verbally and is not contained in the slides.
10. In a given plane, the perceived length of an object depends on the pair of light rays emanating from the two points of the object in that plane that subtend the greatest angle at the eye. chapter 2 | Collinearity and Angle
11. chapter 2 | Collinearity and Angle Points that are collinear with the eye will appear to share the same position, and hence, appear to be the same point.
12. The apparent dimension of an object does not depend directly on what its actual dimension is, nor at what distance from the eye it is placed. It depends directly on one, and only one thing: the angle subtended by it at the eye. The larger this angle compared to the angles of other objects, the larger it will look compared to them. chapter 2 | Collinearity and Angle
47. chapter 3.4.1 | Applications: The Cube A cube of side-length 50cm dx = 20cm dy = 30cm dz = 1m The reference frame is at a distance df = 10cm, and graduated in meters.
69. chapter 3.4.5 | Applications: The Sphere x2 + y2 + (z-d)2 = r2 The perceived size of an object depends on the pairs of light rays emanating from it that subtend the greatest angle at the eye.