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An ST elevation is considered significant if the vertical distance inside the ECG trace and the baseline at a point 0.04 seconds after the J-point is at least 0.1 mV (usually representing 1 mm or 1 small square) in a limb lead or 0.2 mV (2 mm or 2 small squares) in a precordial lead. [2] The baseline is either the PR interval or the TP interval ...
An illusion closely related to the checker shadow illusion, which also relies on using implied visual shadows to seemingly darken a brighter region to the same color as a well-lit dark region, involves two squares placed at an angle, with the darker square being lit and the lighter square at an angle which receives poor light. [2]
Date/Time Thumbnail Dimensions User Comment; current: 17:50, 9 February 2010: 654 × 390 (1 KB): Wgabrie: I made the file size smaller: I removed the Inkscape extensions, combined same-size paths, and snapped the grid to whole number coordinates.
The small tortoiseshell butterfly is able to differentiate between various flowers through visual signals. [16] Tortoiseshell butterflies in particular tend to prefer colours at both ends of the visible light spectrum for humans, 400 nm and 600 nm. [17] These correspond to the colours violet and red respectively.
Media in category "Images of butterflies and moths" This category contains only the following file. Plate II Kallima butterfly from Animal Coloration by Frank Evers Beddard 1892.jpg 1,695 × 2,722; 1.77 MB
The butterfly is 21 to 29 mm (0.83 to 1.14 in) wide with wings outstretched and slightly shorter in length. [6] Female Cupido comyntas museum specimens. Eastern tailed-blue larvae feed on various legumes and are known to secrete a substance which is favored by some ant species. The ant in turn protects the larva of the butterfly from other ...
Butterflies and moths can see ultraviolet (UV) light and wing colors and patterns are principally observed by Lepidoptera in these wavelengths of light. [13] The patterns seen on their wing under UV light differ considerably from those seen in normal light. The UV patterns act as visual cues that help differentiate between species for mating.
Lycaena phlaeas, the small copper, American copper, or common copper, is a butterfly of the Lycaenids or gossamer-winged butterfly family. According to Guppy and Shepard (2001), its specific name phlaeas is said to be derived either from the Greek φλέγω ( phlégo ), "to burn up", or from the Latin floreo , "to flourish".