On 08/04/2018 19:31, Tim Streater wrote:
In article , ARW
wrote:

On 08/04/2018 18:16, Jim K wrote:
Clive Arthur Wrote in message:
On 08/04/2018 14:02, Jim K wrote:
ARW Wrote in message:
On 08/04/2018 11:42, Jim K wrote:
If you're up above the clouds its no. 2...

It's still blue if you are below the clouds.

Not at night.

Do things lose their colour when there is no light?

Yes.

So what colour is a blue football in a dark room?

Black. The colour of something is a function of what light it reflects.
A black football reflects no light (pretty much) when light shines on
it. In a dark room it's reflecting no light, therefore it's black.

And you could make it look red by shining a strong red light on it.


I suspect that any answer less than 1,000 words would not be good enough
to satisfy an Oxbridge admissions tutor

(Though sadly I was never one. Nor did I have an interview with one.)

--
Robin
reply-to address is (intended to be) valid