Electrical Question in 'Pub Quiz'

[securespark]

Sorry no it doesn't.
You have to be old so you can legally say, "Back in my day...…."

 

[bernardgreen]

The answer they wanted was red, yellow, blue.

The primary colours of pigment are magenta, yellow, and cyan (commonly simplified as red, yellow, and blue).

 

[davelx]

Indeed - there are two sets of primary colours - additive and subtractive:
https://science.howstuffworks.com/primary-colors.htm

 

[JohnW2]

The primary colours of pigment are magenta, yellow, and cyan (commonly simplified as red, yellow, and blue).

I think that's misleading. As has been implied by davelx, it's not a matter of 'simplified' - magenta, yellow and cyan are the usual subtractive primary colours, whilst red, green and blue are the usual additive ones.

Kind Regards, John

 

[bernardgreen]

deleted

 

[DetlefSchmitz]

It's not really helped by this Wikipedia article. I couldn't make head or tail of the diagrams.
https://simple.wikipedia.org/wiki/Primary_color

 

[Harry Bloomfield]

We of course have a few odd things in the UK, at this time of year 12:30 am is in the middle of the day, but around Christmas time it's in the middle of the night. As it does not matter if summer time or winter time mid day is when the sun is at it max height and before that point it is AM and after that point PM, so during British summer time noon is at 13:00 hours, so before that time it is AM. But although that may be technically correct, I think most to still consider 12:30 AM to be in the middle of the night.

Interesting, because that had never occurred to me before. I tend to only use the 24 hour clock privately to avoid the am/pm confusion, but I bet a lot of official sources using am/pm get that wrong

 

[JohnW2]

We of course have a few odd things in the UK, at this time of year 12:30 am is in the middle of the day, but around Christmas time it's in the middle of the night. As it does not matter if summer time or winter time mid day is when the sun is at it max height and before that point it is AM and after that point PM, so during British summer time noon is at 13:00 hours, so before that time it is AM. But although that may be technically correct, I think most to still consider 12:30 AM to be in the middle of the night.

I missed this until Harry highlighted it.

I really think you're trying to be 'too clever'. Whatever one might think about the literal derivation of "AM"/"PM", they are always taken to mean before/after 12:00 'clock time' (be that when the sun is at its highest, or otherwise!)!

Kind Regards, John

 

[ericmark]

I did say that, but be it a quiz or the wiring regulations people will take what it literally says rather than what they know is intended.

 

[JohnW2]

I did say that, but be it a quiz or the wiring regulations people will take what it literally says rather than what they know is intended.

I think the example give may be different - I suspect that, even 'literally, in English (rather than Latin), "AM" probably means 'before 12:00 clock time' or 'before noon' (or words to that effect) - albeit dictionaries seem to be a bit vague/confused/ambiguous about this!

Kind Regards, John

 

[bernardgreen]

In my opinion AM starts at midnight and ends at noon, PM starts at noon and ends at midnight.

 

[JohnW2]

In my opinion AM starts at midnight and ends at noon, PM starts at noon and ends at midnight.

I don't think many would disagree with that - but that doesn't really help, since 'noon' and 'midnight' then have to be defined (during a period of 'daylight saving', like UK summer).

Kind Regards, John

 

[ericmark]

I blame the railways, before railways noon mean noon.

 

[JohnW2]

I blame the railways, before railways noon mean noon.

If you want to get really pedantic about the definition of 'AM' and 'PM', within any one time zone there is, strictly speaking, only one precise longitude for which the sun is at it highest in the sky at 12:00 (or 13:00 when there is daylight saving) - move a millimetre, or even a micron, East or West of that longitude and the strict (per Latin) definition goes wrong.

Kind Regards, John

 

[bernardgreen]

(during a period of 'daylight saving', like UK summer).

In UK in summer noon is 11 o'clock on GMT ( or Zulu ) and 12 o'clock on BST

Hence the use of the 24 hour clock system