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Rayleigh Criterion

12 Followers

• Diffraction limits resolution. • For a circular aperture, lens, or mirror, the Rayleigh criterion states that two images are just resolvable when the center of the diffraction pattern of one is directly over the first minimum of the diffraction pattern of the other. • This occurs for two point objects separated by the angle θ = 1.22 λ / D, where λ is the wavelength of light (or other electromagnetic radiation) and D is the diameter of the aperture, lens, mirror, etc. This equation also gives the angular spreading of a source of light having a diameter D. From http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/Raylei.html Average vision is 5 × 10⁻⁴ radians or 103.13 arcseconds or a ratio of 1:2000 [1 unit resolvable at 2000 units]

K. A. Patterson - American Songwriter

12 Followers

MUSIC Promotion - Mostly Classic & Neo-Traditional Country Mainly promoting Songwriter K. A. Patterson (yours truly), showcased mostly through performances by the Middle Tennessee studio ensemble K. A. Patterson and the Paradise Band (KAP&TPB). Earlier tunes are reminiscent of Country\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'s "golden age", the mid 1960\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'s to mid 1980\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'s. Charlie Pride, Linda Ronstadt, Merle Haggard, Dottie West, Glen Campbell, Emylou Harris, Conway & Loretta, Kenny & Dolly, Randy Travis, Highway 101, etc. Later tracks are much like the Country Music from 1985-2005. Restless Heart, Patty Loveless, Garth Brooks, Kathy Mattea, Lonestar, Reba McEntire, Diamond Rio, Martina McBride, etc. Throughout K. A. Patterson music, you\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'re likely to hear John Denver, The Eagles, Pure Prairie League, Marshall Tucker, Paulette Carlson, and similar Artist styles. Some KAP music bridges the gap from the afore-mentioned to "Today\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'s Country". Other Country Artists+great music from Artists of other genres are also featured.

Weekly Stories from your favorite Chronicler

11 Followers

Hi, welcome to my channel where I focus on publishing weekly original stories that I wrote in audio format. I write in many genres of fiction from fantasy, wuxia, horror, to dramas about life and short stories. In short, I like to muse, explore themes, go on journeys, and learn about life, the world, and myself in the process. I’d like to take you along this adventure be it happy and sweet, or dark and challenging. In end, I’m sure we’ll come out stronger, better. If you enjoy what you hear, please like, subscribe, and comment to let me know what you like or perhaps don’t like about my stories. Then go spread the word and tell a friend. Also, if you are a HUGE fan, then consider going to Ko-fi in the link in the description and buy me a cup of coffee or be a patron. Either way, I appreciate your support and for spending your time with me and my characters. Enjoy!

Cute cats are my favorite animal🩷

10 Followers

Welcome to our channel, 'Paws&fur' - your ultimate destination for everything cat-related! Join us for a daily dose of feline fun, featuring adorable cat videos, helpful care tips, engaging cat product reviews, heartwarming rescue stories, and entertaining cat behavior insights. Delve into the world of whiskers and purrs with our delightful content that celebrates the charm and magic of our beloved furry companions. Subscribe and be part of our vibrant cat-loving community!