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wornish
1st December 2018, 12:43 PM
Some big numbers here.

4 X 10 ^84 photons.

Or put another way: 4,000,000,000,000,000,000,000,000,000,000,000,000, 000,000,000,000,000,000,000,000,000,000,000,000,00 0,000,000,000 photons.

https://www.sciencedaily.com/releases/2018/11/181129142414.htm

TimP
1st December 2018, 01:36 PM
That’s an awfully round number, it can’t be right surely!

wornish
1st December 2018, 01:49 PM
That’s an awfully round number, it can’t be right surely!

Who knows its just a ballpark figure to get the order of magnitude. It sure is big *yes

Human brains can't conceive these types of numbers they are just big.

TimP
1st December 2018, 02:10 PM
Can it be compared to the usual benchmark then? The size of Wales.

wornish
1st December 2018, 03:56 PM
I'm bored so

There is a basic way to talk about the effective “size” of a photon, and that is through its wavelength. Very roughly, the interaction range of a photon scales with its wavelength, so light of longer wavelength is more likely to interact with a conductive material than light of a shorter wavelength. In this way you could say the “size” of photon is basically the width of its wavelength. The wavelength of green light is about 500 nanometers.
So its area is 250000 sq nanometers

Wales has an area of 20,735 square Kilometres.
Thats 20735 *10^24 square Nanometers.

So it would take (20735/250000) x 10^24 photons to cover an area the size of Wales

I think that's about 0.083 * 10^24 green photons

Or 8.3 x 10^22 photons.

So to answer your question the total number photons ever produced would cover an area equal to this many times the size of Wales

(4 x 10^82) / (8.3 x 10^22)

Thats 0.48 x 10^60 Wales. Assuming there are no clouds :D

OM USer
1st December 2018, 04:42 PM
With all that light why do I keep shooting at ISO 2000?

wornish
1st December 2018, 04:43 PM
With all that light why do I keep shooting at ISO 2000?

Maybe because all the photons are in Wales

TimP
1st December 2018, 04:43 PM
With all that light why do I keep shooting at ISO 2000?

Perhaps you need to be in Wales!

(Damn! Beaten to it)

Naughty Nigel
1st December 2018, 11:14 PM
Some big numbers here.

4 X 10 ^84 photons.

Or put another way: 4,000,000,000,000,000,000,000,000,000,000,000,000, 000,000,000,000,000,000,000,000,000,000,000,000,00 0,000,000,000 photons.

https://www.sciencedaily.com/releases/2018/11/181129142414.htm

How many London Buses is that? And how many football pitches would they need to park them all?

Come to that, how many Olympic swimming pools of water would you need to water the grass that the London Buses are parked on? :D

pdk42
2nd December 2018, 12:15 AM
Pink Floyd, Echoes:


And through the window in the wall
Come streaming in on sunlight wings
A million bright ambassadors of morning


Wonderful piece of music...

(even if 10^6 is somewhat of an underestimate - you'd have thought that Brian May, having a PhD in Physics, would have known better).

TimP
2nd December 2018, 07:40 AM
Where does Brian May fit into Echoes?

pdk42
2nd December 2018, 08:49 AM
Where does Brian May fit into Echoes?

Good point ... confusing Pink Floyd and Queen! Duh.

TimP
2nd December 2018, 08:54 AM
I wondered if I was missing something!
Two bands not easy to confuse really.
Saw them both in the 70s, never since though. I think Floyd was the DSOTM tour and Queen we’re supporting Mott The Hoople and then headlining. Happy days.

pdk42
2nd December 2018, 09:18 AM
I wondered if I was missing something!
Two bands not easy to confuse really.
Saw them both in the 70s, never since though. I think Floyd was the DSOTM tour and Queen we’re supporting Mott The Hoople and then headlining. Happy days.

Yeah, completely different bands. My only excuse was I typed it after an evening of wine and plenty!

You were lucky to see them both. Queen supporting Mott the Hoople? Nice.

Mind you, I saw Dire Straits in the late 70s and they were supporting Talking Heads.

Zuiko
2nd December 2018, 10:00 AM
Some big numbers here.

4 X 10 ^84 photons.

Or put another way: 4,000,000,000,000,000,000,000,000,000,000,000,000, 000,000,000,000,000,000,000,000,000,000,000,000,00 0,000,000,000 photons.

https://www.sciencedaily.com/releases/2018/11/181129142414.htm

They are big numbers - it looks like the cost of Brexit to me! ;) :D *chr

Phill D
2nd December 2018, 10:03 AM
I saw Queen at the Victoria Hall in Stoke in 1973. They must have been supporting Mott the Hoople but I can't remember them on the night! I'd never heard of Queen at the time but they were fantastic.

Otto
2nd December 2018, 10:10 AM
Mind you, I saw Dire Straits in the late 70s and they were supporting Talking Heads.


I saw Genesis supporting Caravan in (I think) 1970! I saw the Floyd at Earls Court in 1994, the gig that subsequently became released as the "Pulse" DVD. Terrific stuff :). I don't know if it's true but I'd like it to be - apparently David Gilmour booked one of the Pink Floyd tribute bands for his 60th birthday bash. I bet they were nervous!

TimP
2nd December 2018, 01:17 PM
Yeah, completely different bands. My only excuse was I typed it after an evening of wine and plenty!

You were lucky to see them both. Queen supporting Mott the Hoople? Nice.

Mind you, I saw Dire Straits in the late 70s and they were supporting Talking Heads.

99% sure it was Mott, but I’d need to hunt out the ticket to be sure. Never saw Talking Heads, mores the pity, same with Dire Straits despite loving the early albums, Making Movies in particular.

TimP
2nd December 2018, 01:21 PM
I saw Genesis supporting Caravan in (I think) 1970! I saw the Floyd at Earls Court in 1994, the gig that subsequently became released as the "Pulse" DVD. Terrific stuff :). I don't know if it's true but I'd like it to be - apparently David Gilmour booked one of the Pink Floyd tribute bands for his 60th birthday bash. I bet they were nervous!

Genesis played our school end of term ‘dance’. Fond memories of Gabriel’s story telling about the Giant Hogweed and more. Talking of tribute bands, there was a Canadian one (I think) called Musical Box who did note perfect versions of the early Genesis stuff.

Jim Ford
2nd December 2018, 02:42 PM
Would these be popular music artists being discussed here?

;)

Jim

Naughty Nigel
2nd December 2018, 03:07 PM
Pink Floyd, Echoes:



Wonderful piece of music...

(even if 10^6 is somewhat of an underestimate - you'd have thought that Brian May, having a PhD in Physics, would have known better).

Would it be any less accurate than "Nine million bicycles in Beijing"?

'That's a fact, It's a thing we can't deny.' :)

Wee man
2nd December 2018, 03:12 PM
How many LED candles is that?


Sent from my SM-G930F using Tapatalk

Otto
2nd December 2018, 03:24 PM
Would it be any less accurate than "Nine million bicycles in Beijing"? :)


Or four thousand holes in Blackburn Lancashire?

TimP
2nd December 2018, 04:47 PM
Would these be popular music artists being discussed here?

;)

Jim

You’d probably think of them as ‘popular beat combos’ or even ‘beatniks’ :D

Jim Ford
2nd December 2018, 07:00 PM
You’d probably think of them as ‘popular beat combos’ or even ‘beatniks’ :D

Nope - you've lost me!

Jim

TimP
2nd December 2018, 07:10 PM
Blimey! I didn’t think the age poll / survey went that high! Good on you for being so lively! Nurse will bring your Horlicks soon.

Jim Ford
3rd December 2018, 08:13 PM
Blimey! I didn’t think the age poll / survey went that high! Good on you for being so lively! Nurse will bring your Horlicks soon.

I was brought up on "Mares eat oats and does eat oats, and little lambs eat ivy. Kids'll eat ivy too, wouldn't you?"

Jim

TimP
3rd December 2018, 08:22 PM
Yeah, sadly I know that too.

Otto
4th December 2018, 09:31 AM
So do I, sadly, but only because my mother told me about it ;).

Wee man
23rd January 2019, 11:42 AM
I remember the revived 78!

Sent from my SM-T280 using Tapatalk

TimP
23rd January 2019, 12:21 PM
Wow, we’ll over a month between posts! Does your internet arrive and depart via Parcel Farce?