How come my reflection is upside down on a spoon when I look into it on the top side. When I look at it on the bottom its rightside up. Is it the curviture relecting on itself?
126893
the reflection is flipped because it is a concave surface. This means that all the light entering the spoon is curved towards the focus point, where if hit that focal point the image is all distorted and past that point light from the bottom half of the spoon has crossed the center and is now at the top.
616027
its probably a scratch. some times you polish a mark off. but seeing as you monitor is stil working forget and learn to live with it
72002
I cannot tell you whether or not it has been done...\nBut I will never be truly "trapped" even with a mirror with a fairly high finish (aka 1-2 microns) there is still a loss every time it "bounces" off the mirror + if you do not do it in a vacuum there will be atomspheric losses as well.\nHenceforth if it is "trapped" it wouldn't stay there for long..
531992
So you've got the look-down angle and you can cut a piece  of scrap to check that that's right, then you scribe top and bottom on your scrap with a 1/2 inch or 1/4 inch inset so you can see what angle you need from top to bottom? This is the 75 degree that you are talking about?\n\nIf so then, when you invert (assuming the top and bottom faces are parallel) you still have a 75 degree angled cut don't you?   Why not just cut for the look-down, offer it up and scribe then hand-plane?
391204
Yeah, you described it very poorly.  I don't even know where X should be.  But from what I've read, you're probably dealing with a transversal.  That should be easy.\nSupplements, interior angles, corresponding angles, exterior angles, supplementary/complementary angles  - ring a bell?
23098
A mirror preserves absolute direction, both horizontally and vertically.  Say you're facing west; the reflection of your north hand is on the same side of the room as your real north hand -- namely the north side.  And the reflection of the top of your body is toward the ceiling, just like the real top of your body.  That's because north vs. south and up vs. down are the same for everybody.  But right and left are not absolute directions.  Your north hand is on the right because you're facing west.  If someone were facing east, their north hand would be on the left.  And your reflection in this example _is_ facing east because you are facing west, and the reflection is looking back at you.  So, your reflection's north hand, which is the same as your north (that is, right) hand, is its left hand.
195012
It does neither. It just reflects a laterally inverted image which has nothing to do with left-right or top-bottom.
549583
It's called a palindrome. : )\nP.S. this is interesting... an ambigram can be read upside down and right side up. An example is ipod! . Tilt your head upside down and see what I mean... Hope this helps!
207240
yes, you are right- the ideas of up and down are indeed relative. On earth, we have a wonderous and magical force called gravity- which solves the problem easily as we are best one way up really. so technically, neither you nor the paper is upside down. It does however make sense to assume in such a situation that the paper is at fault and turn it round, rather than yourself. Or does that pose another question?
76971
It's because left and right are relative terms, while up and down refer more to absolutes.  If were facing east looking into a mirror, our right hand would be south, and our left hand north.  Referred to north and south, there is no inversion--move your "north hand" and the image's "north hand" moves; move your south hand and the images south hand moves.  The problem is that left/right is a special sort of orientation that is centered from ourselves and distinguishes from two symmetrical sides of ourselves.  You right hand looks like the reflection of you left hand, but when you look at the reflection of your left hand, that reflect is still on *your* left.  If you imagine that the image reflected is some different person, and you try to set up a left/right orientation with resepct to the person in the mirror, it will be backwards--but that's only because it is erroneous to think that the reflection of your right hand is your reflection's left hand.  It isn't; it just looks like a left hand because our bodies display left/right symmetry.  If your head looked like the mirror image of your feet, you might make the same mistake, but the body does not display any manner of top/bottom symmetry.
187783
Well if you are talkin about a mirror made of floated glass a layman can c the quality of it other wise ind. know how is required i think (i am not proffesional in it, just being in a float glass plant for a week). If it is a mirror and you c a distracted reflection then b sure that there is impurity in the glass, as well as the transparency of float glass is supposed to be very high compares to the conventional one.
249217
simple  for smooth surfaces, the angle of incidence is equal to the angle of reflection\nso the angle of reflection is going to be the same angle mentioned in the question
504057
this tessellation is both a rotation and translation...there is no reflections here...basiccally you notice that you can shift the shape to various places on the tessellation and have it reoccur...this is called translation.  you also notice that if you change the orientatoin of the shape...for instatnce...rotate it you find several occourances found on the tessellation\n\nhowever, this shape does not reflect because it is not symmetric anywhere.\n\nhope this helps, matttlocke
167480
Theoretically, you are correct. However small the additional weight is in one pan, the beam must rotate till it comes to vertical position.\n\nIn practice, the pivot about which the beam turns is not exactly at its center point.\n\nHowever we can make it as close as it is possible.\n\nNext is the sharpness of the pivot. Theoretically it should be a point. But with a microscope we will see it is some what blunt.\n\nAnother thing is mass distribution on both sides of the beam should be uniform. There is practical limit.\n\nBecause of these imperfections a small additional weight placed in one pan makes the moment about this small deviated point of the center equal to the moment of the less weight placed in the other pan.\n\nThis is called sensitivity of the balance. By careful manufacturing process we increase this accuracy.\n\nKeep a foot scale on your index finger and balance it. Since the finger has some width, you can easily balance it. The center of the scale can be displaced to some extent. \nBut it will be difficult to balance it on a sharp edge.  Depending upon the sharpness the sensitivity increases.\n\nIf every thing is nearly perfect the beam should oscillate about a mean position.
587097
fork and spoon - right hand
267423
If it has any writing on the contact, like a number or something, that part is on the outside, so when you put the contact in that part would be facing outward.  You can usually tell by it being more uncomfortable if it is inside out.  But since you just got them, that will be hard for you to tell, since it feels uncomfortable both ways, but one should feel worse than the other.
188694
the effect is called Gradient!\n\nUse the help menu to figure it out, i dont have the menus memorized to talk you through it