File:Light echo principle.svg
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Size of this PNG preview of this SVG file: 512 × 384 pixels. Other resolutions: 320 × 240 pixels | 640 × 480 pixels | 1,024 × 768 pixels | 1,280 × 960 pixels | 2,560 × 1,920 pixels.
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Summary[edit]
| Description | Simplified principle of a light echo, drawn by CMG Lee based on http://esahubble.org/images/heic0304f . Coloured spots denote stationary dust particles around a dying star, denoted by the white spot. When the star explodes, light rays are emitted in every direction. Coloured arrows denote rays reflected by each particle towards the observer, who is so distant that incoming rays are effectively parallel. All paths have the same length as it is a snapshot of a moment in time. It can be seen that the all rays arriving at a given time are reflected from particles in a paraboloid. Rays arriving later come from a wider paraboloid with the same focus. The explosion appears to initially expand faster than the speed of light despite the particles being at rest. In the SVG file, hover over a region to highlight it. |
| Source | Own work |
| Author | Cmglee |
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I, the copyright holder of this work, hereby publish it under the following licenses:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
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- to remix – to adapt the work
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- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:21, 25 October 2022 | | 512 × 384 (20 KB) | Cmglee (talk | contribs) | Add animation of image of light echo |
| 01:26, 16 October 2022 |  | 512 × 384 (17 KB) | Cmglee (talk | contribs) | Add CSS3 animation | |
| 00:18, 15 October 2022 |  | 512 × 384 (14 KB) | Cmglee (talk | contribs) | Add labels and interactivity | |
| 01:46, 14 October 2022 |  | 512 × 384 (11 KB) | Cmglee (talk | contribs) | Fix formula | |
| 01:03, 14 October 2022 |  | 512 × 640 (11 KB) | Cmglee (talk | contribs) | {{Information |Description=A simplified principle of a light echo, drawn by CMG Lee. Coloured spots denote effectively stationary dust particles surrounding a dying star, denoted by the white spot. When the star explodes, light rays are emitted in every direction. The coloured arrows denote light rays that reflect off each particle towards the observer, who is so distant that incoming rays are effectively parallel. As it is a snapshot of a moment in time, all paths have the same length. It ca... |
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