| 1 | Place curved mirrors at hallway intersections or concealed areas. | |
| 2 | Applied range: convex mirror, prism, cellular phone, camera lenses, optical glass, and so on. | |
| 3 | As seen here, some sapphires, when cut to a convex shape, exhibit a striking six-pointed star in direct sunlight. | |
| 4 | Cloud formations such as mammatus or lenticular among others, are perfect examples of how intricate and different nature can be. | |
| 5 | The Western Tianshan high-pressure metamorphic rocks occur within the greenschist facies country rocks as small discrete blocks, lenses, bands, laminae or intercalated slabs. |
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