A prism is a transparent object that refracts light. That bottle would certainly do that, so it is a prism. Prisms can be in various unusual shapes, as in the pentaprism of an SLR camera.


Still a prism, all the same.

As a primary school teacher, the definition of a prism given to pupils is a shape that when you slice it vertically, you still get the same shape, albeit of different dimensions. A cuboid is a prism, a cube is not. A toblerone box is triangular prism shaped, the bottle is not (but it's quite cool).


This, however, is a geometric prism and there are other definitions .

By that definition a cylinder is a prism, and I don't see why a cube would not be also. By any of these definitions a cube is a prism.

i don't think it matters i thought Prism was a lousy name for a drink, it doesn't even convey drink to me. the product itself looked professional enough despite the name and flippin colour, which i think had a big big factor in him losing, i think it would sell as a drink. as for urbon, i thought it was clever but for what it's worth it didn't do much for me. I thought the bottle looked like a sauce bottle, lol

as for the adverts, any of us could have come up with those,there was nothing to them at all,i suppose budget was a big factor

i love this years series and wasn't surprised when Sir Alan told Chris Bates that his door is always open, which for me was the highlight of the series.

thought Stella deserved to win, didn't think she would though and thought in the final she started her speeches with a negative,which was fine but fairly unusual for her i thought

You see what they've done there is a basic schoolboy error.

As a scientist, that depends on the angle of the incident light!!

Three faces. That should have said three faces.

Just realise what I typed after I shut down the computer.

And no one picked it up!

Chris said on Breakfast this morning that Shibby had picked up on it at the time and told them is wasn't a prism although that bit wasn't shown and they ignored him anyway!

No, I meant sides.

But I was wrong

This discussion takes me back to school Physics, studying heat, light and mechanics. I remember how I was as fascinated by the new words learnt: prism and refraction - as by the subject itself.

Here are a couple of definitions from Webster's:

Refract (r?fr$kt), v. t. [imp. & p. p. Refracted; p. pr. & vb. n. Refracting.] [L. refractus, p. p. of refringere; pref. re- re- + frangere to break: cf. F. réfracter. SEe FRacture, and cf. Refrain, n.] 1. To bend sharply and abruptly back; to break off.
[1913 Webster]

2. To break the natural course of, as rays of light orr heat, when passing from one transparent medium to another of different density; to cause to deviate from a direct course by an action distinct from reflection; as, a dense medium refracts the rays of light as they pass into it from a rare medium.
[1913 Webster]

Prism (pr&ibreve_;z'm), n. [L. prisma, Gr. prisma, fr. prizein, priein, to saw: cf. F. prisme.] 1. (Geom.) A solid whose bases or ends are any similar, equal, and parallel plane figures, and whose sides are parallelograms.
[1913 Webster]

&hand_; Prisms of different forms are often named from the figure of their bases; as, a triangular prism, a quadrangular prism, a rhombic prism, etc.
[1913 Webster]

2. (Opt.) A transparent body, with usually three rectangular plane faces or sides, and two equal and parallel triangular ends or bases; -- used in experiments on refraction, dispersion, etc.
[1913 Webster]

3. (Crystallog.) A form the planes of which are parallel to the vertical axis. See Form, n., 13.
[1913 Webster]

Achromatic prism (Opt.), a prism composed usually of two prisms of different transparent substances which have unequal dispersive powers, as two different kinds of glass, especially flint glass and crown glass, the difference of dispersive power being compensated by giving them different refracting angles, so that, when placed together so as to have opposite relative positions, a ray of light passed through them is refracted or bent into a new position, but is free from color. -- Nicol's prism, Nicol prism. [So called from Wm. Nicol, of Edinburgh, who first proposed it.] (Opt.) An instrument for experiments in polarization, consisting of a rhomb of Iceland spar, which has been bisected obliquely at a certain angle, and the two parts again joined with transparent cement, so that the ordinary image produced by double refraction is thrown out of the field by total reflection from the internal cemented surface, and the extraordinary, or polarized, image alone is transmitted.
[1913 Webster]

Personally I thought the bottle looked more like one of those trendy modern lava lamps.

I thought it was a clever design though. Even though, as Dara said, it could be a lethal weapon.

It reminded me of that Box from Hellraiser 2 (you know, when it changes shape)..

Watching TV with you lot must be fun.

Lol !

So, four walls do not a prism make.