So it is not at ALL true that the " core cause is that left and right are usually understood as relative directions while up and down are absolute positions ".
22.
By placing bets on the relative direction of interest rates in two countries, fund managers can remove from the investment equation the variations that occur when the value of a foreign investment is translated into American dollars.
23.
However, a ( well polished ) mirror reflects light in a different sense called " specular reflection ", which preserves the relative directions of light rays, and gives the illusion that you are looking at objects beyond / behind the plane of the mirror.
24.
:It's some sort of telltale designed to enable someone to evaluate the extent to which the crack is developing, and or the relative directions of travel of the two plates as they move relative to eachother .-- ( talk ) 10 : 40, 26 May 2010 ( UTC)
25.
A " massless " particle moves with the speed of light, so a real observer ( who must always travel at less than the speed of light ) cannot be in any reference frame where the particle appears to reverse its relative direction, meaning that all real observers see the same chirality.
26.
If the index finger of the right hand is pointed forward, the middle finger bent inward at a right angle to it, and the thumb placed at a right angle to both, the three fingers indicate the relative directions of the " x "-, " y "-, and " z "-axes in a " right-handed " system.
