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21-Jun-2016 10:58

Over the last two millennia, physics was a part of natural philosophy along with chemistry, biology, and certain branches of mathematics, but during the scientific revolution in the 17th century, the natural sciences emerged as unique research programs in their own right.

Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined.

Classical mechanics predicted a varying speed of light, which could not be resolved with the constant speed predicted by Maxwell's equations of electromagnetism; this discrepancy was corrected by Einstein's theory of special relativity, which replaced classical mechanics for fast-moving bodies and allowed for a constant speed of light.

The earliest civilizations dating back to beyond 3000 BCE, such as the Sumerians, ancient Egyptians, and the Indus Valley Civilization, all had a predictive knowledge and a basic understanding of the motions of the Sun, Moon, and stars.

The stars and planets were often a target of worship, believed to represent their gods.

While the explanations for these phenomena were often unscientific and lacking in evidence, these early observations laid the foundation for later astronomy.

Modern physics began in the early 20th century with the work of Max Planck in quantum theory and Albert Einstein's theory of relativity.

Both of these theories came about due to inaccuracies in classical mechanics in certain situations.

The earliest civilizations dating back to beyond 3000 BCE, such as the Sumerians, ancient Egyptians, and the Indus Valley Civilization, all had a predictive knowledge and a basic understanding of the motions of the Sun, Moon, and stars.

The stars and planets were often a target of worship, believed to represent their gods.

While the explanations for these phenomena were often unscientific and lacking in evidence, these early observations laid the foundation for later astronomy.

Modern physics began in the early 20th century with the work of Max Planck in quantum theory and Albert Einstein's theory of relativity.

Both of these theories came about due to inaccuracies in classical mechanics in certain situations.

while Greek poet Homer wrote of various celestial objects in his Iliad and Odyssey; later Greek astronomers provided names, which are still used today, for most constellations visible from the northern hemisphere.