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Posted: **Tue Jul 17, 2007 1:23 pm**

Which square is a darker grey ? A or B?

Posted: **Tue Jul 17, 2007 2:00 pm**

both the same

had a lecture about all this kinda stuff at uni a few months ago

oh and,
what do i win?

Posted: **Tue Jul 17, 2007 6:05 pm**

but its a

Posted: **Wed Jul 18, 2007 6:18 am**

no it isn't

Posted: **Wed Jul 18, 2007 7:03 am**

No it is not Nana.

They are 100% the same. Check it with either photoshop or take a piece of paper and make 2 wholes in it on the places of the squares. Then put it on the screen and see that they are the same color

/me hands Pikeh a forum cookie

Posted: **Wed Jul 18, 2007 8:01 pm**

'tis WitchCraft!!! Burn the heretic

or soemthing

Posted: **Thu Jul 19, 2007 6:10 am**

Hoonius wrote:'tis WitchCraft!!! Burn the heretic

or soemthing

i agree

its a

/refuses to believe in optical illusions

(and yea i know its the same but i hate it when it is the same. want one person to do this and it actually be a darker colour

)

Posted: **Thu Jul 19, 2007 1:53 pm**

but in essence B is darker as it is shrouded in the shadow of the upright thus making it darker while A is bathed in the light coming from the right side.

Posted: **Thu Jul 19, 2007 2:31 pm**

Posted: **Thu Jul 19, 2007 6:22 pm**

As it happens, B is darker because of the way the squares merge with surrounding squares and the fact surrounding squares of B are darker than the squares surrounding A. Whilst the colour is identical in the centre of squares, the average across both squares puts B darker due to said merging between squares.

Do I get a medal for going too much into it and somewhat proving the expected answer wrong

?

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