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[Golfbuddy]

This is assuming that light is not subject to the Doppler effect?

Light and the doppler effect is the basis of the theory of relativity.  That said, your answer is still valid.  

It is?  

[Golfbuddy]

I've been following this one for a while whilst I tried to get my head round the question. My theory is as follows.

If you enter a dark room and turn on the light, the light will move at the speed of light until it reaches your eye. This has been measured as you say at 'the speed of light'.

Therefore, when you turn off the light, the light will recede at the an equal speed (assuming the speed of light is constant and who am I to argue?) meaning that the speed of dark is merely the speed at which light recedes i.e. the same. This is assuming that light is not subject to the Doppler effect?

Problem solved. Next.

 

Been working on this for Hours too. What happens then if i just close my eyes, how fast does it move then???

That may take a little longer but I reckon J-P Sartre may have had something to say about it. This is surely an existentialist question?  

[theolodian]

This is assuming that light is not subject to the Doppler effect?

Light and the doppler effect is the basis of the theory of relativity.  That said, your answer is still valid.  

It is?  

Barring some creative definition of dark, it is the absence of light.  The speed of absence of light is the same as the speed of light.  The speed of leaving is the same as the speed of arriving, relativity takes care of the doppler effect meaning that the speed of the observer is irrelevant.

[STMO123]

Hmmm....dark does not arrive...light ceases to arrive.....not the same.

Told you this would get silly :-/

[Crazydad]

I've been following this one for a while whilst I tried to get my head round the question. My theory is as follows.

If you enter a dark room and turn on the light, the light will move at the speed of light until it reaches your eye. This has been measured as you say at 'the speed of light'.

Therefore, when you turn off the light, the light will recede at the an equal speed (assuming the speed of light is constant and who am I to argue?) meaning that the speed of dark is merely the speed at which light recedes i.e. the same. This is assuming that light is not subject to the Doppler effect?

Problem solved. Next.

 

Been working on this for Hours too. What happens then if i just close my eyes, how fast does it move then???

That may take a little longer but I reckon J-P Sartre may have had something to say about it. This is surely an existentialist question?  

Had to look that one up...................................

Existentialism is a philosophical movement which claims that individual human beings create the meanings of their own lives. It is a reaction against more traditional philosophies, such as rationalism and empiricism, which sought to discover an ultimate order in metaphysical principles or in the structure of the observed world, and therefore universal meaning. The movement had its origins in the 19th century thought of Kierkegaard and Nietzsche and was prevalent in Continental philosophy. In the 1940s and 1950s, French philosophers such as Jean-Paul Sartre, Simone de Beauvoir, and Albert Camus wrote scholarly and fictional works that helped to popularize themes associated with existentialism: "dread, boredom, alienation, the absurd, freedom, commitment, [and] nothingness".[1]

[Golfbuddy]

This is assuming that light is not subject to the Doppler effect?

Light and the doppler effect is the basis of the theory of relativity.  That said, your answer is still valid.  

It is?  

Barring some creative definition of dark, it is the absence of light.  The speed of absence of light is the same as the speed of light.  The speed of leaving is the same as the speed of arriving, relativity takes care of the doppler effect meaning that the speed of the observer is irrelevant.

I see. I also wish I'd paid more attention in physics.  

[Golfbuddy]

Had to look that one up...................................

 >:(Existentialism is a philosophical movement which claims that individual human beings create the meanings of their own lives. It is a reaction against more traditional philosophies, such as rationalism and empiricism, which sought to discover an ultimate order in metaphysical principles or in the structure of the observed world, and therefore universal meaning. The movement had its origins in the 19th century thought of Kierkegaard and Nietzsche and was prevalent in Continental philosophy. In the 1940s and 1950s, French philosophers such as Jean-Paul Sartre, Simone de Beauvoir, and Albert Camus wrote scholarly and fictional works that helped to popularize themes associated with existentialism: "dread, boredom, alienation, the absurd, freedom, commitment, [and] nothingness".[1]

Obviously!!

[Crazydad]

Had to look that one up...................................

 >:(Existentialism is a philosophical movement which claims that individual human beings create the meanings of their own lives. It is a reaction against more traditional philosophies, such as rationalism and empiricism, which sought to discover an ultimate order in metaphysical principles or in the structure of the observed world, and therefore universal meaning. The movement had its origins in the 19th century thought of Kierkegaard and Nietzsche and was prevalent in Continental philosophy. In the 1940s and 1950s, French philosophers such as Jean-Paul Sartre, Simone de Beauvoir, and Albert Camus wrote scholarly and fictional works that helped to popularize themes associated with existentialism: "dread, boredom, alienation, the absurd, freedom, commitment, [and] nothingness".[1]

Obviously!!

That lot went straight over my head, :-/

 put it in here to make you think i new what  i was talking about

Coming up to a senior soon.....................

[Golfbuddy]

Had to look that one up...................................

 >:(Existentialism is a philosophical movement which claims that individual human beings create the meanings of their own lives. It is a reaction against more traditional philosophies, such as rationalism and empiricism, which sought to discover an ultimate order in metaphysical principles or in the structure of the observed world, and therefore universal meaning. The movement had its origins in the 19th century thought of Kierkegaard and Nietzsche and was prevalent in Continental philosophy. In the 1940s and 1950s, French philosophers such as Jean-Paul Sartre, Simone de Beauvoir, and Albert Camus wrote scholarly and fictional works that helped to popularize themes associated with existentialism: "dread, boredom, alienation, the absurd, freedom, commitment, [and] nothingness".[1]

Obviously!!

That lot went straight over my head, :-/

 put it in here to make you think i new what  i was talking about

Coming up to a senior soon.....................

Mine too. He was obviously off sick the day they did punctuation at school.  

Anyway, will you stop changing your avatar! I keep looking in the 'Welcome' section to welcome a new member only to see it's you.

 

[theolodian]

Hmmm....dark does not arrive...light ceases to arrive.....not the same.

Told you this would get silly :-/

The campfire discussions in Wales are bound to impress . . .  

[Golfbuddy]

Hmmm....dark does not arrive...light ceases to arrive.....not the same.

Told you this would get silly :-/

The campfire discussions in Wales are bound to impress . . .  

Yes, perhaps we could rekindle the bog-roll thread?  

[Crazydad]

Had to look that one up...................................

 >:(Existentialism is a philosophical movement which claims that individual human beings create the meanings of their own lives. It is a reaction against more traditional philosophies, such as rationalism and empiricism, which sought to discover an ultimate order in metaphysical principles or in the structure of the observed world, and therefore universal meaning. The movement had its origins in the 19th century thought of Kierkegaard and Nietzsche and was prevalent in Continental philosophy. In the 1940s and 1950s, French philosophers such as Jean-Paul Sartre, Simone de Beauvoir, and Albert Camus wrote scholarly and fictional works that helped to popularize themes associated with existentialism: "dread, boredom, alienation, the absurd, freedom, commitment, [and] nothingness".[1]

Obviously!!

That lot went straight over my head, :-/

 put it in here to make you think i new what  i was talking about

Coming up to a senior soon.....................

Mine too. He was obviously off sick the day they did punctuation at school.  

Anyway, will you stop changing your avatar! I keep looking in the 'Welcome' section to welcome a new member only to see it's you.

 

I havent found one i really like yet, they all mirrow my moods at the moment.............

[paul.c]

how many stars are there in the whole solar system

[Golfbuddy]

how many stars are there in the whole solar system

One.

[Crazydad]

`How fast must  Superman have flown, to turn back time and save Lois lane. :-/ :-/