 Having learned about refraction in our recent posts, we can now begin to appreciate the imaging capability of a lens by applying the principle of Snell’s law to understand the way in which a glass surface can bend light rays to form an image. To see how this works, we first think about a cylindrical piece of…  The Middle Branch of the Escanaba River begins northwest of Humboldt, Michigan and flows south and east until it joins the East Branch just below the the town of Gwinn. Highly oxygenated riffles, pools the size of small lakes, spring-fed tributaries, and an abundant supply of food make the resident trout happy which, in turn, causes… 2 comments Nice Tim. Good memories. Can’t wait for that pic of the three of us with the sign. Nice Tim. Good memories. Can’t wait for that pic of the three of us with the sign!  Over a period of several months in 2005 and 2006, a half-dozen artists converted a shuttered F-18 aircraft hanger into the largest camera ever made. To darken the hanger the artists used 24,000 square feet of viscuine, 1,300 gallons of foam gap filler, one and a half miles of gorilla tape, and 40 cans of… no comments  Snell’s Law enables us to predict the way a light ray will refract — or bend — when it enters a new surrounding with a different refractive index. If the new surrounding has a larger refractive index the ray will bend toward the surface normal; if the new surrounding has a smaller refractive index the ray… no comments  I keep a picture of a river, and what used to be a store. Joshua Davis Delta 88 from the album Fool Rooster You can float the main branch of the Escanaba River from Princeton to Cornell, but, if you drive the narrow two-lane blacktop roads between those Ivy League cities, you’ll likely see this… no comments  The main branch of the Escanaba River — or the Big Escanaba — begins at the confluence of its East and Middle Branches just south of the town of Gwinn and east of the small settlement of Princeton. From there the big river flows south and east spilling over four dams before it surges into… no comments  When we look at a scene through clear air the rays from all locations arrive through straight lines. Light from parts of the scene that are directly in front of us enters our eyes at an angle of zero degrees; light from parts of the scene that are 45 degrees off to our left enters… no comments  So with the advance in years, if not precisely wisdom, I looked for other things to do to while away the more resolutely riseless hours and avoid the risk of ever becoming bored with my greatest outdoor love. These antiboredom diversions were few at first but presently grew and grew. Chief among them was gathering… no comments  To my mind there is no fairy wand in creation more graceful and beautiful than a good bamboo fly rod. John Voelker Spots Before the Eyes in Trout Madness “If you have the okay to pull the trigger, I would do it and enjoy the rod for the rest of your life. You could get… 2 comments Very nicely written piece, Tim. The pics are wonderful too. Adam’s grandfather was an inspiration to my writing. More and more the bamboo rod is the thread that links everything together for me. Enjoy your rod and may there be many more perfect days on the stream. Jerry Kustich Thanks for the nice words, Jerry, and thanks for making such wonderful rods. I just watched “Trout Grass” again, and the start-to-finish story of a bamboo rod really is special. Magic wands, indeed. An angler who doesn’t catch any fish, because he uses only dry flies the size of dandruff, often conceitedly refers to himself as a purist. Other anglers refer to him as a loon. Patrick F. McManus Rubber Legs and White Tail-Hairs Share no comments  Life photographer Robert Kelley took over 1,400 photographs when he visited John Voelker in 1961. I have a reproduction of this one on the wall in my office: (From Life magazine.) The light. The fog. The person. The place. I’ve often wondered how Mr. Kelley felt when he took that photograph. Fifty years later I… no comments  In about 140 AD the Greek scientist Claudius Ptolemy compared the direction light traveled in air with the direction it traveled after passing into water, and he recorded his observations in a table that looked something like this: Although Ptolemy presented his results as measurements, historians of science believe he used a mathematical rule to… no comments |
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