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Olbers's paradox says that because the night sky is dark, at least one of these three assumptions must be false. Olbers's paradox , also known as the dark night paradox or Olbers and Cheseaux's paradox , is an argument in astrophysics and physical cosmology that says the darkness of the night sky conflicts with the assumption of an infinite and ...
Olbers' paradox: Why is the night sky dark if there is an infinity of stars, covering every part of the celestial sphere? GZK paradox : Extreme-energy cosmic rays (like the Oh-My-God particle and several others after it) have been observed that seem to violate the Greisen–Zatsepin–Kuzmin limit , which is a consequence of special relativity .
The expansion of space summarized by the Big Bang interpretation of Hubble's law is relevant to the old conundrum known as Olbers' paradox: If the universe were infinite in size, static, and filled with a uniform distribution of stars, then every line of sight in the sky would end on a star, and the sky would be as bright as the surface of a ...
For example, considering a 2 kg rocket: at 1 m/s, the rocket starts with 1 2 = 1 J of kinetic energy. Adding 1 m/s increases the kinetic energy to 2 2 = 4 J, for a gain of 3 J; at 10 m/s, the rocket starts with 10 2 = 100 J of kinetic energy. Adding 1 m/s increases the kinetic energy to 11 2 = 121 J, for a gain of 21 J.
One example occurs in the liar paradox, which is commonly formulated as the self-referential statement "This statement is false". [16] Another example occurs in the barber paradox, which poses the question of whether a barber who shaves all and only those who do not shave themselves will shave himself. In this paradox, the barber is a self ...
The infinitely dense gravitational singularity found as time approaches an initial point in the Big Bang universe is an example of a physical paradox.. A common paradox occurs with mathematical idealizations such as point sources which describe physical phenomena well at distant or global scales but break down at the point itself.
To me, one of the strongest arguments against the Steady State theory has always been Olber's Paradox. The Big Bang answers it quite neatly. Should I mention it in the article? Jhobson1 10:52, 26 May 2007 (UTC) No, because it is not true. See Olber's article - explained by the redshift. --Michael C. Price talk 21:30, 16 August 2007 (UTC)
As the best known of the paradoxes, and most formally simple, the paradox of entailment makes the best introduction. In natural language, an instance of the paradox of entailment arises: It is raining. And It is not raining. Therefore George Washington is made of rakes.