Limited Time Sale$13.61 cheaper than the new price!!
| Management number | 22782098 | Release Date | 2025/11/11 | List Price | $20.41 | Model Number | 22782098 | ||
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The speed of light is a universal physical constant and the basis of this ruler, made 29.98 cm in length and equal to the distance light travels in one billionth of a second. This amazing ruler, marked off in increments of 10 light-picoseconds, was created by Michael Stevens. The five other edges of this ruler are marked with the folowing scales: cm, decimal inches, sound microseconds, micro-Mt.Everests, and beard-fortnights. Part of a Curiosity Box subscription. Fast shipping from Florida!
| Category | Tools > Measuring & Layout > Other Measuring & Layout |
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| Size | N/A |
| Brand | None |
| Condition | New |
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