h a l f b a k e r y"Bun is such a sad word, is it not?" -- Watt, "Waiting for Godot"
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A ruler, of otherwise normal construction, is simply shortened
slightly. Thus, if placed beside an object in a photo, the
object appears longer.
To prevent accidental use in critical applications, the back of
the ruler would be stamped with "FOR NOVELTY USE ONLY /
NOT LEGAL FOR TRADE".
Shrunken Household Objects
Shrunken_20household_20objects A similar idea to this one, on a slightly different scale. [Wrongfellow, Oct 11 2011]
Model Car Hoax Kit
Model_20Car_20Hoax_20Kit The other way around; making large objects look snmaller. [swimswim, Oct 19 2011]
[link]
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Slightly baked - potters use reduced-scale rulers, to measure the final size of things they're making, because clay will shrink 5%-10% in drying and firing (depending on the type of clay). |
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That is such a cool thing to learn at the end of a day. |
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Nice one [Alx xlA]. Needs a Product: measuring instrument; evil, category though. |
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I can imagine the spam now. "ARE U EMBARRASED BY UR JAR SIZE?" |
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Professional modelers (and really serious hobbyists) use
'scaled-up' rulers all the time. When I worked for the RR,
there was a railfan who had special permission to enter
company property to take pictures, and he had a stick that
he'd prop against something for perspective. It was marked
in 1:1 scale along one edge, and in 1:1-to-HO scale on the
other (HO is about 1:80, I think). Then, when he got home,
he could reference the pictures when constructing perfect
scale models of buildings and other installations for his
layout. I've seen other modelers do this. Too. Sort of the
same idea, but in reverse. |
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Similarly: Coins that are slightly larger than normal size, useful for making microchips and spy cameras look smaller in photos than they are in real life. |
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"Objects against ruler are shorter than they appear". |
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"Subjects against ruler last shorter than they appear." FTFY [Loris] |
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One of the recent findings to emerge from the
interface between cosmology, quantum mechanics
and origami is that _everything_ is, in fact, very
slightly larger than it appears. |
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Except, of course, Tom Cruise. But he's probably the exception that proves the rule. |
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If the ruler is moving really fast relative to the object being measured, it appears shorter. Or at least some famous guy claimed so. |
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I could have sworn we'd done this, but I'm not in a position
to check ATM. |
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This is one of the reasons I always wanted to buy a
circumference ruler as it would just drive people
crazy. |
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Thanks [wrongfellow] that was the one I was thinking of. |
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//Subjects against ruler last shorter than they appear.// |
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Or subjects against ruler end up being shorter than they were. |
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Couldn't you just throw the ruler really fast across the field of view and use a ridiculously fast shutter speed? |
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// really fast across the field of view // |
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No, because there will be minimal relativistic effects. |
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These effects depend on the velocity of the observed object relative to the observer. An object moving normally to the observer's sightline, however fast, will approach and recede at a much lower relative velocity as it effectively traverse the base of an isosceles triangle, with the relative velocities at the point of closest approach being zero. |
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