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Started by Pope Beanie Oct 2, 2012. 0 Replies 0 Likes
Viewpoint: Quantum Dots Tuned for EntanglementEntanglement distinguishes quantum mechanics from classical…Continue
Tags: photons, physics, quantum dots, entanglement, quantum
Started by Mallory. Last reply by Jon van Rooyen May 23, 2011. 1 Reply 1 Like
I'm really curious, does anyone else get NASA TV, let alone watch it? I watch it more than any other channel. It's just fascinating! I'm watching a live interview with the Italian astronaut from the ISS right now. They've got a guy in England…Continue
Started by Mallory Jan 5, 2011. 0 Replies 0 Likes
http://www.zooniverse.org/projects This site allows you to take part in discovering our universe. I've joined Galaxy Zoo Hubble. It's just awesome!Continue
Started by Sydni Moser Nov 18, 2010. 0 Replies 0 Likes
18 November 2010 By Neil Bowdler Science reporter, BBC News This artist's impression shows HIP 13044 b, an exoplanet orbiting a star that entered the Milky Way from another galaxyAstronomers claim to have discovered the first planet originating…Continue
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I'm not the one who chose to equate 'at rest' with 'not accelerating'. 'At rest' doesn't actually mean anything in Special Relativity, where everything moves relative to something else. since SR rejects the principle of an universal frame of reference.
But if you assume that 'at rest' and 'not accelerating' mean the same thing, as the article does (and why not? It's only a definition), then it follows that any inertial frame of reference is at rest. And that includes (unaccelerated) photons.
Then, from (1), you have to conclude that photons move through time;
And from (2), that they don't.
Contradiction.
Obviously the article uses a non-standard definition of acceleration since it also also equates traveling/moving with accelerating. I have the impression the author uses 'accelerating' for 'moving' (whether the motion is inertial or not), and 'not accelerating' for 'at rest relative to an universal frame of reference'. And that would be enough to make Einstein rock and roll in his grave.
I disagree:
(1) But, when you’re at rest (not accelerating) all of your head’s movement is through time, none of it is traveling (accelerating) through space.
(2) Since light waves use all of their motion to travel through space at Light Speed, they have absolutely no motion through Time.
Since light waves (photons) are technically at rest (not accelerating), we have an obvious contradiction here.
Funny. I've made the same hypothesis about photons being unaffected by time somewhere on this site, but it's the first time I see someone else trying to make that point. Anyway there seems to be a good bit of confusion between speed and acceleration here. Photons move at constant speed, i.e. they don't "accelerate", so this reasoning would not apply to them.
Smallest exoplanet found so far, orbiting Kepler-10
Astronomers have discovered the smallest planet outside our solar system, and the first that is undoubtedly rocky like Earth.
Measurements of unprecedented precision have shown that the planet, Kepler 10b, has a diameter slightly lower than Earth's, and a mass 4.6 times higher. [more]
(Actually, given that iron is the most stable element and that Earth's core is all iron and nickel, there's no way a rocky planet smaller than Earth could be 4.6 times as massive. See here for the most accurate data there is on the Kepler mission.)
Started by Mallory. Last reply by Jon van Rooyen May 23, 2011. 1 Reply 1 Like
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Posted by ETRON on September 6, 2019 at 12:44pm 0 Comments 0 Likes
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