The passage of light through a material, such as red light passing through red cellophane., He studied and explained the concept of refraction, The concept that the Earth is a three-dimensional sphere, proven by the Greeks through observations of lunar eclipses and the positions of stars., The ancient belief that the Earth is the center of the universe., You can see your image in a shiny, flat surface because light waves bounce directly back at you and your eyes. This is an example of ________., A mathematician who used Brahe’s data to formulate the three laws of planetary motion., The tendency of an object to resist changes in its state of motion., A force that opposes the relative motion of two surfaces in contact., A discrete packet or "particle" of light energy., The bouncing back of light when it hits a surface., The bending of light as it passes from one medium to another (e.g., air to water)., A mirror that curves inward (like a spoon’s front), which can magnify or flip images., An optical illusion caused by the refraction of light through air layers of different temperatures., The astronomical model in which the Earth and planets revolve around the Sun., Occurs when the Moon passes between the Sun and Earth, blocking sunlight., A form of electromagnetic radiation visible to the human eye., The physicist who first proved the existence of electromagnetic (radio) waves., The number of wave cycles passing a point per second., Long-wavelength electromagnetic waves used for wireless communication, first experimentally produced by Hertz., The combination of two or more waves that results in a new wave pattern., Electromagnetic radiation with a frequency higher than visible light; carries enough energy to cause sunburn., A device for producing electrical sparks, used by Hertz to generate radio waves., A material that does not allow light to pass through it., An image formed where light rays appear to come from but do not actually meet (like your reflection in a flat mirror)., Typically a red light used in photography because red photons have low energy and won't "trigger" the chemical reaction on photo paper., A device used by Hertz to produce and send out radio waves., A wave consisting of oscillating electric and magnetic fields that travel through space., Primary Colors of Light _______________., An opposing force that acts against an object moving through the air, slowing it down., According to Aristotle, __________ is the motion that occurs due to an external force acting upon an object.

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