exam 1 - About Science What is science? What is the...

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About Science What is science? What is the scientific method? When a theory could be defined as scientific? Gravitation Planetary motions o Ptolemaic system (geocentric) o Copernican system (heliocentric) Tycho Brahe’s astronomical observations and why were important Kepler's Laws of Planetary Motion o Planets describe elliptical orbits (where is the Sun located?) o Planets move fastest when closest to the Sun, and slowest when farthest from it (sweep equal areas in equal times) o Relationship between the period and semimajor axis of the orbit (P 2 =a 3 ) Galileo’s discoveries using a telescope Newton's Laws of Motion o Principle of Inertia o F=ma (acceleration, a change in velocity, is proportional to the force applied) o Principle of action and reaction Newton's Law of Universal Gravitation o Gravitational force is proportional to the masses involved and inversely proportional to the square of the distance between them. o Understand how it explains different orbits (think of a ball thrown horizontally at different speeds, Fig 4-20 book) o It accounts for Kepler’s laws The Nature of Light Light is electromagnetic radiation and is characterized by its wavelength Know the electromagnetic spectrum (from longest to shortest wavelength or otherwise) o radio, microwave, infrared, visible (ROYGBV), ultraviolet, x-rays, gamma rays Understand a Planck curve (black body curve): An opaque object emits electromagnetic
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This note was uploaded on 02/06/2011 for the course ASTR 113 taught by Professor Geller during the Spring '08 term at George Mason.

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exam 1 - About Science What is science? What is the...

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