Colour on Black and White TV

  JumpingJack 20:20 02 Apr 2008
Locked

Surely not the right place to post a thread on this but hey, cant see any better.

Sitting here thinking about the good old days and the time i was sitting in front of the TV watching the Tomorrow People.

Parents set was Black and White and colour wasnt around much in those days. There was a scene where the Characters watched a TV and that TV came through as colour!!

How is that possible? Surely a black and white TV cannot reproduce colour. If it can, why wasnt the rest of the screen in colour?

This isnt a trick question just been puzzled for last 30 years!

  Stuartli 21:22 02 Apr 2008

Will probably remain a puzzle.

But not really worth having worried about it for the past 30 years...:-)

  JumpingJack 23:28 02 Apr 2008

lol... you may have a point there. Perhaps parents had spiked my meal!

Still, its one of lifes little wonders...

  BT 08:16 03 Apr 2008

I vaguely remember that. It was a technical trick that caused an optical illusion of some kind but I can't remember how it was done.

  Stuartli 08:31 03 Apr 2008
  lofty29 15:18 03 Apr 2008

I remeber an OXO advert called "oxo brings you colour" back in the old b&w tv days but cannot say how it was done

  Monument 15:56 03 Apr 2008

A black and white TV cannot display colour. Only shades of black gray and white.

click here shows how Black and White and colour TV works. As can be seen a colour TV gets its colour from red green and blue coating on the screen.

  Stuartli 15:58 03 Apr 2008

That's a momentous discovery...:-)

  lofty29 16:14 03 Apr 2008

Monument
I do not think anyone here is suggesting that it was "COLOUR" as we know it, only an illusion of colour. It is a true saying that the human eye sees what it expects to see.

  Monument 16:46 03 Apr 2008

In jumping jacks opening post he states

"There was a scene where the Characters watched a TV and that TV came through as colour!!"

and then poses the question

"How is that possible? Surely a black and white TV cannot reproduce colour. If it can, why wasnt the rest of the screen in colour?"

I was confirming it was not possible. Either in reality or as an illusion/trick. - unless his parents painted it onto the screen!!!!

  lofty29 17:01 03 Apr 2008

Monument
I can confirm it definitely "appeared" as a form of colour, I remember watching the OXO advert on tv. I can only assume that the greyscale flickering images were percieved by the optic nerve and transmitted to the brain as colour

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