This is true. It is also irrelevant to this discussion. Given the dimensions involved, it's a sharp edge for all practical purposes. I have to deal with Maxwell every work day. Your lens is just a scanning antenna who's pattern is described by a second order bessel function. All of the math will tell you that the limiting factor is the lens and the "fuzzy edge" may be modeled as an edge in the mathematics. Your high school physics books will not help you with this.
Regards, Bob... -------------------- "Let us contemplate our forefathers, and posterity, and resolve to maintain the rights bequeathed to us from the former, for the sake of the latter. The necessity of the times, more than ever, calls for our utmost circumspection, deliberation, fortitude, and perseverance. Let us remember that 'if we suffer tamely a lawless attack upon our liberty, we encourage it, and involve others in our doom.' It is a very serious consideration that millions yet unborn may be the miserable sharers of the event." - Samuel Adams, 1771 ----- Original Message ----- From: "Frantisek Vlcek" <[EMAIL PROTECTED]> To: "Bob Blakely" <[EMAIL PROTECTED]> Sent: Friday, January 18, 2002 5:26 AM Subject: Re: And did I mention wrong > BB> 1. Point your face toward any automobile. > BB> 2. Note that there are photons comming at your (I'm beginning to think > BB> blind) eyeball. > BB> 3. Some photons are comming from the background. > BB> 4. Some photons are comming from the car. > BB> 5. There photons from the car and the photons from the background form a > BB> sharp line on your retina. Or they would if your eye's lens was perfect. > BB> 6. The same thing hapens in a camera. > BB> 7. In other words, there is a sharp demarcation between car and not car. > > BB> If you do not understand this, there is no hope for you. > > Bob, perhaps it's time for you to rehearse physics - light is a wave > as much as particle thing. Therefore, there is NO such thing as sharp > demarcation. ~PERIOD~. Look into any high-school physics book. - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
