Friday Quiz time

Originally Posted by Strzelecki

Ah good one ,thanks. I misread the first answer (dam those spellings) but as I've given it away now I can't go back (both yours and the other answer would really be incorrect).

no problem

[Wicked_and_Crazy]

Originally Posted by Strzelecki

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No you still get the point!

so why is refraction wrong? bending of light

[Angua]

14 butylated hydroxytoluene (preservative)

[Strzelecki]

Originally Posted by Wicked_and_Crazy

so why is refraction wrong? bending of light

When a Blue Jay's feather is held so it can be viewed by transmitted light and not reflected light, it reveals its true colour - brown.

Therefore it's not due to diffraction or refraction that they are blue. Do you want the point or shall I give it to Homealone?

14 butylated hydroxy toluene - which wasn't googled, but if it is what you had in mind, strz, why only breakfast cereal?

[Strzelecki]

Originally Posted by Angua

14 butylated hydroxytoluene (preservative)

Correct

---------- Post added at 21:49 ---------- Previous post was at 21:49 ----------

Originally Posted by homealone

14 butylated hydroxy toluene - which wasn't googled, but if it is what you had in mind, strz, why only breakfast cereal?

Already gone, did I say only?

[Wicked_and_Crazy]

Originally Posted by Strzelecki

Therefore it's not due to diffraction or refraction that they are blue. Do you want the point or shall I give it to Homealone?

exactly!! transmitted light shows brown, reflected light shows blue ie the light has been refracted

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12 http://en.wikipedia.org/wiki/Variometer

[Strzelecki]

Originally Posted by Wicked_and_Crazy

exactly!! transmitted light shows brown, reflected light shows blue ie the light has been refracted

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12 http://en.wikipedia.org/wiki/Variometer

Nope (hint:geology)

Originally Posted by Strzelecki

Correct

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Already gone, did I say only?

true

[Wicked_and_Crazy]

12 measure magnetic forces googled

[Strzelecki]

Originally Posted by Wicked_and_Crazy

12 measure magnetic forces googled

At last, well it actually measures variance in magnetic force and not the actual force itself. It one of the ways they found that the Earths magnetic field has reversed before. From the mid-atlantic ridge outwards there are magnetic stripes of rock with reverse polarities.

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I make 7, 9 16 and 20 to be the ones left.

[Wicked_and_Crazy]

Originally Posted by Strzelecki

At last, well it actually measures variance in magnetic force and not the actual force itself. It one of the ways they found that the Earths magnetic field has reversed before. From the mid-atlantic ridge outwards there are magnetic stripes of rock with reverse polarities.

Originally Posted by Strzelecki

Therefore it's not due to diffraction or refraction that they are blue. Do you want the point or shall I give it to Homealone?

it is Gary's point, not mine

[Marge]

Any clues for 9?

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16) William Cullen ?

[Strzelecki]

Originally Posted by Marge

Any clues for 9?

Ok - radiation