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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…..
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20-25 multiple choice
10-15 true and false
12-15 vocabulary matching (use you definition sheets to study from)
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?
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