Are shadows two dimensional?
964998
A shadow, by definition, is the two-dimensional projection cast by light on a three-dimensional body.  Think of it this way.  Even if you had a shadow cast by a cardboard movie cut-out of Superman, that cardboard has a given thickness that makes it three-dimensional.  However, the shadow it casts has no real thickness.
649942
Sorry, it's not 3D.\n\nMove to one side. Do any of the elements in the photograph move in relation to each other? Do the items in the foreground now hide different elements in the background? If the image was 3D then they would.
1103163
no, two- dimensional objects aren't real in that sense... even a sheet of paper (as close to 2-d as you can get in the physical world) is really 3 dimensional and does have wieght and mass.
567146
It's all shadows on the wall, man, shadows on the wall.  We think it's the real thing, but it's not.  It's illusory.  The *real* world only exists in the pure forms of beauty, truth, and justice.
449037
the sun was behind the clouds, therefore there was a shadow.
302305
b'coz in street light are placed at almost constant distance from each othere. the shadow wil appear opposite side of street light means if street poll is in fornt of u and u r near to the poll then shadow will be behind u and simillarly poll is behind u and and if u r near to that poll then shadow will be in front of u.\nthis is due to intensity.
403308
It is correct, but there's no way to paste diagrams here. Just draw the intersecting circles (i.e. 7 regions) and then shade the appropriate areas.
140317
Something that has height (length) and width . . . and no depth.\n\nDraw a square on the piece of paper. That square is two dimensional . . . if you draw a cube . . . it shows a third dimension (depth).
490916
In geometrical optics with a pointlike sun the airplane would cast a shodow on the surface.\n\nBut: 1) The sun isn't pointlike but appears as a disc in the sky, so if light from diffent edges of the disc would cross under the plane ther would be no sharp shadow anymore, from a viewpoint on the surface the plane wouldn't cover the sun as whole\n\n2) Light is a wave, so geometic optics is not the whole story, there is refraction that bends the light into the shadow region. That's what you call "refill the void".
953851
Oh, not AGAIN !  \nNo we didn't - unless there are several strong light sources there to be able to cast shadows in about five directions at once..........
882142
They exist, they are just not practical for visualizing 3D geometry.\n\nMost people have trouble with 1st and 3rd angle (2nd and 4th would be front and back "views" given a "side" projection).
210611
The edges are anywhere that 2 of the surfaces connect.  If you are given enough information, say the coordinates of one of the corners and some combination of length, width, height, surface area or volume, you should be able to draw it in 3-dimensional space.
858717
oblique, obilisque shape
918551
1) darkness or a shadow\n\n2) the sides of it
872501
because our shadows are the result of light refracted from our body
123579
Shadows should be black, because a shadow is abscence of light. But really the air scatters lights, and what you see is the surface where the shadow is illuminated by this scattered light or by reflection on another surface.\nWhere there is no atmosphere you will see deep black shadows, for example in the pictures of astronauts in the moon.
631426
H is double shadow so it would be 9m\nMultply 4.5 x 2 for answer.