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Light and Optical Systems – Unit Exam Review Sheet Make sure you are familiar with the following. The exam will be comprised of….. 20-25 multiple choice 10-15 true and false 12-15 vocabulary matching (use you definition sheets to study from) 3-5 short answer Chapter 1: explain what light is differences and examples of natural and artificial light describe/define incandescent; florescent; bioluminescent; phosphorescent; chemiluminescent o know some examples of each too calculate the cost of running a/an lighting/appliance...etc. (short answer) draw and label a ray diagram...what is the purpose of a ray diagram? (short answer) define opaque, translucent, and transparent explain what happens to light when it reaches a surface o reflected, transformed, refracted; absorbed (what happens) Chapter 2/3: state the law of reflection and refraction using a ray diagram.....draw/label accurately diagrams of both o rays, angles, normal line, plane how does density relate to refraction? What is the penumbra effect? o Explain the difference between a solar and lunar eclipse Chapter 4: describe the characteristics of different type of lenses o characteristics of convex, concave o how does light react traveling through double convex, double concave explain the difference between near-sighted and far-sighted o how and where does an image fall within the eye for people with either condition be able to identify the similarities between cameras and eyes label a diagram of the eye - 9 parts (short answer) o state the function/purpose of each part Chapter 5: explain the difference between a refracting and reflecting telescope o how does light react inside these? identify the purpose of prisms in binoculars Chapter 6: list or draw the colors of the spectrum of light (short answer) explain why we see the colors we do when we look at an object identify the primary colors of o primary colors of light (additives) o primary colors of dyes/inks (subtractives) what happens when we combine certain colors? all the colors? identify the purpose of cones and rods in the eye what animal kingdom has the best developed color sight? least? describe color-blindness o varieties? Chapter 7: draw and label a wave model diagram (short answer) o trough, crest, amplitude, wave length, at rest explain frequency….how is frequency and wave length connected? o How do we measure and calculate frequency? (short answer) explain how sunsets illustrate the wave model of light laser o stands for? o difference to normal light? o uses of explain fiber optics what is Li-Fi? Chapter 8: draw and label the electromagnetic spectrum list/identify the wavelengths and frequencies of the visible light spectrum o which have the shortest/longest wave lengths? o which have the greatest/lowest frequency? what are some uses of the different types of radiation on the EMR spectrum? What is ozone? What purpose does it serve? Why is UV radiation dangerous to people? The planet? o How can we protect ourselves from UV radiation?