AST101H1 Chapter Notes - Chapter 5.1-5.4 : Blueshift, 30 Foot Fall, Atomic Number
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AST101H1 Full Course Notes
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Rate of energy flow = power measure in watts. Red/yellow/blue = primary colours of fusion, directly detected. Emits visible light, energy comes from electrical potential energy. Wavelength: distance from one peak to the next. Frequency: amount of peaks passing by any point each second. Light waves are travelling vibrations of electric and magnetic fields --> electromagnetic wave. All light travels at the speed of light (300 km/s) Light comes in individual pieces that have properties of both particles and waves. All ordinary matter is composed of atoms properties depend on physical characteristics of atoms --> corresponds to different atoms. Protons, neutrons are found in the nucleus, electrons surround. Tells how strongly they will react with electromagnetic fields. Attraction between positive and negative keeps atoms together. Different number of protons in nucleus --> atomic number. Combined number of protons and neutrons = atomic mass. Isotopes: versions of an element with different number of neutrons.