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A user with 1,694 edits. Account created on 30 September 2015.
2 January 2025
- 04:0104:01, 2 January 2025 diff hist +241 Angle of view (photography) →Calculating a camera's angle of view: Improved the description of a figure. current Tag: Visual edit
1 January 2025
- 11:4911:49, 1 January 2025 diff hist +776 Oscilloscope →Bandwidth: Added a section for waveform and sampling intervals. Tag: Visual edit
29 December 2024
- 02:4602:46, 29 December 2024 diff hist +38 Angle of view (photography) →Calculating a camera's angle of view: Make "foreshortening" linked. Tag: Visual edit
- 02:2002:20, 29 December 2024 diff hist +160 Rectilinear lens Make a link for full frame and its explanation. current Tag: Visual edit
27 December 2024
- 04:0004:00, 27 December 2024 diff hist +172 Angle of view (photography) Clarified how the crop factor is used to get the same field of view when the full frame image sensor (equivalently 35 mm film) is used. Tag: Visual edit
- 03:4003:40, 27 December 2024 diff hist +1 Crop factor →Introduction: Added a necessary empty space. current Tag: Visual edit
- 03:4003:40, 27 December 2024 diff hist +570 Crop factor Added more comments for clear understanding of what the full frame is and what the formula of 1.6 * 50 = 80 in a figure means. Tag: Visual edit
23 December 2024
- 02:2802:28, 23 December 2024 diff hist +34 Angle of view (photography) Slightly refined a sentence of a paragraph for smooth connection between the paragraph and the previous paragraph. Tag: Visual edit
- 02:1702:17, 23 December 2024 diff hist +306 Angle of view (photography) Added clarification of a difference between the angle of view and the angle of coverage, and refine the definition of the angle of coverage (determined by not only the lens but also image plane location rather than the image sensor or film itself). Tag: Visual edit
21 December 2024
- 05:5405:54, 21 December 2024 diff hist +1,454 Oscilloscope →Probes: Added a section for probe ground. Tags: Reverted Visual edit
16 December 2024
- 23:0723:07, 16 December 2024 diff hist +273 Input impedance Added what is the input impedance when an instrument is used to measure electrical properties of an electrical circuit. This is a confusing point. current Tag: Visual edit
11 December 2024
- 04:0104:01, 11 December 2024 diff hist −2 Oscilloscope →Features and uses: Make the first word "input impedance" as a corresponding Wikipedia page link. Tag: Visual edit
10 December 2024
- 00:2400:24, 10 December 2024 diff hist +64 Radiance Added a relationship between intensity and radiance in a common meaning in physics. current Tag: Visual edit
9 December 2024
- 01:1201:12, 9 December 2024 diff hist +244 Diffuse reflection Added more explanation of why diffuse reflection makes visibility of objects on many circumstances. Tag: Visual edit
3 December 2024
- 12:2412:24, 3 December 2024 diff hist −17 Perspective (graphical) →Renaissance: Slightly simplified the description. Tag: Visual edit
- 12:2212:22, 3 December 2024 diff hist +162 Perspective (graphical) →Renaissance: Modified the description of the prospective experiment by Brunelleschi for better readability. Tag: Visual edit
- 11:5111:51, 3 December 2024 diff hist −7 Filippo Brunelleschi →Linear perspective: Removed unnecessary word and spaces. Tag: Visual edit
27 November 2024
- 22:5922:59, 27 November 2024 diff hist −9 Perspective (graphical) →Examples of two-point perspective: Moved a picture from 3 points prospective to 2 points prospective. Tag: Visual edit
- 22:5522:55, 27 November 2024 diff hist −343 Perspective (graphical) →Overview: Modified the contents in the section Overview to clarify how linear or point-projection prospective works. Tag: Visual edit
25 November 2024
- 04:0404:04, 25 November 2024 diff hist +170 Perspective (graphical) →Overview: Re-ordered the figure positions and add more explanation to a re-positioned figure to clearly show what linear or point-projection prospective is. Tag: Visual edit
21 November 2024
- 22:4822:48, 21 November 2024 diff hist +18 Perspective (graphical) →Examples of one-point perspective: Mentioned that a wall facing an observer at a tilted angle in a figure explaining point-projection prospective. Tag: Visual edit
20 November 2024
- 07:2007:20, 20 November 2024 diff hist +56 Significant figures →Multiplication and division: Added an example of significant figures in multiplication. Tag: Visual edit
19 November 2024
- 02:3602:36, 19 November 2024 diff hist +514 Perspective (graphical) Added visually explaining how point-projection prospective works. Tag: Visual edit
- 02:0102:01, 19 November 2024 diff hist −2 Perspective (graphical) →Examples of three-point perspective: Slightly modified the explanation of the three-points prospective cube. Tag: Visual edit
- 01:5901:59, 19 November 2024 diff hist +85 Perspective (graphical) →Examples of three-point perspective: Added a more explanation on the three-points prospective cubes. Tag: Visual edit
15 November 2024
- 01:0401:04, 15 November 2024 diff hist +247 Electric current Added a convention that the actual electron flow direction is opposite to the convention. Tags: Reverted Visual edit
- 00:4000:40, 15 November 2024 diff hist +192 Voltage Added a case that voltage is often mentioned at a point in an electronics system if the system reference potential is recognized. Tag: Visual edit
14 November 2024
- 10:1410:14, 14 November 2024 diff hist +135 Perspective (graphical) Added more explanations of the definition of linear or point-projection prospective. Tag: Visual edit
- 09:3909:39, 14 November 2024 diff hist −53 Perspective (graphical) →Overview: Removed an unnecessary sentence. Tag: Visual edit
12 November 2024
- 21:3521:35, 12 November 2024 diff hist +59 Perspective (graphical) →Examples of one-point perspective: Added an explanation for a cube with three prospective points. Tag: Visual edit
11 November 2024
- 20:4520:45, 11 November 2024 diff hist +213 Perspective (graphical) →Examples of one-point perspective: Added an explanation and a figure helping to understand prospective lines. Tag: Visual edit
- 03:3603:36, 11 November 2024 diff hist +173 Norton's theorem →Conversion to a Thévenin equivalent: Added a common feature between an original circuit and equivalent circuits. current Tag: Visual edit
- 03:3503:35, 11 November 2024 diff hist +174 Thévenin's theorem →Conversion to a Norton equivalent: Added the common feature observed in an original and equivalent circuits. Tags: Reverted Visual edit
6 November 2024
- 06:3306:33, 6 November 2024 diff hist +76 Thévenin's theorem No edit summary Tag: Visual edit
- 06:1806:18, 6 November 2024 diff hist +84 Norton's theorem Added a missing part to calculate Norton resistance. Tag: Visual edit
- 06:0106:01, 6 November 2024 diff hist +141 Norton's theorem Slightly improved descriptions. Tag: Visual edit
5 November 2024
- 12:5912:59, 5 November 2024 diff hist +4 Norton's theorem Make Edward Lawry Norton in a figure as a Wikipedia link for easy information diving. Tag: Visual edit
31 October 2024
- 02:0602:06, 31 October 2024 diff hist +120 Thévenin's theorem →Practical limitations: Slightly clarified the definition of Thevenin's equivalent circuit. Tag: Visual edit
29 October 2024
- 23:3723:37, 29 October 2024 diff hist +31 Thévenin's theorem Added the meaning of shortening voltage sources and opening current sources as being advised. Tag: Visual edit
- 12:3412:34, 29 October 2024 diff hist +31 Thévenin's theorem Added the meaning of shortening voltage sources and opening current sources. Tags: Reverted Visual edit
- 12:3212:32, 29 October 2024 diff hist +6 Thévenin's theorem →Helmholtz's proof: Added a word indicating where Fig.2 is located. Tag: Visual edit
25 October 2024
- 02:5602:56, 25 October 2024 diff hist +138 Thévenin's theorem →A proof of the theorem: Added common terminologies. Tags: Reverted Visual edit
- 02:4702:47, 25 October 2024 diff hist +36 Thévenin's theorem →A proof of the theorem: improved the description of the section "A proof of the theorem". Tags: Reverted Visual edit
22 October 2024
- 12:1212:12, 22 October 2024 diff hist +4 Astigmatism (optical systems) →Ophthalmic astigmatism: Increased the size of a figure. current Tag: Visual edit
20 October 2024
- 05:4505:45, 20 October 2024 diff hist +107 Astigmatism (optical systems) →Astigmatism in systems that are not rotationally symmetric: Explicitly mentioned that the third order astigmatism occurs only for off-axis object point imaging, and the definition of tangential planes in the last paragraph of a section. Tag: Visual edit
17 October 2024
- 23:0823:08, 17 October 2024 diff hist +17 Astigmatism (optical systems) →Third-order astigmatism: Slightly improved a sentence. Tag: Visual edit
- 22:5822:58, 17 October 2024 diff hist +53 Astigmatism (optical systems) →Third-order astigmatism: Corrected terminology (transverse rays ---> tangential rays). Tag: Visual edit
- 22:2422:24, 17 October 2024 diff hist +71 Focus (optics) Clearly expressed that the diffraction as the ultimate physical limit of light focus ability by any opti Tag: Visual edit
- 08:3608:36, 17 October 2024 diff hist +37 Ray (optics) →Optical systems: Clarify what sagittal planes are. Tag: Visual edit
- 05:4405:44, 17 October 2024 diff hist −497 Astigmatism (optical systems) →Third-order astigmatism: Removed a duplicated paragraph. Tag: Visual edit