1) How do plant cells use various wavelengths of the visible light spectrum? a) to recognize food sources b) for the process of photosynthesis c) to determine when the sun rises and sets d) to detect insects landing on them 2) What is true about the electromagnetic spectrum? a) Longer wavelengths mean higher radiant energy. b) As wavelength increases, so does frequency. c) As wavelength increases, frequency decreases. 3) What is white light? a) It is a mixture of all the wavelengths of electromagnetic energy in the electromagnetic spectrum. b) It is a mixture of all the wavelengths of electromagnetic energy in the visible range of the spectrum. c) It is an absence of most of the frequencies of electromagnetic energy in the electromagnetic spectrum. 4) The crest of one wave meets the trough of a second wave. What is this an example of? a) Constructive interference b) Destructive interference 5) What is the best description of the difference between a mirror and a lens? a) Mirrors reflect light; lenses refract light. b) Mirrors absorb light; lenses transmit light. c) Mirrors can only be plane, while lenses can be concave or convex. 6) How does a green ball interact with light? a) It absorbs all the green light, reflects all colors except green, and transmits nearly no light. b) It transmits only green light, absorbs all other colors, and reflects no light. c) It absorbs all colors of the visible spectrum except green, reflects green, and transmits nearly no light. 7) How are light waves and mechanical waves alike? a) They both have wavelength and frequency. b) They both have amplitude and longitude. c) They both have crests and ditches. 8) The amount of radiant energy depends on the type of electromagnetic wave and its location on the electromagnetic spectrum. Why doesn't this statement answer the question about the relationship among wavelength, frequency, and energy? a) It doesn't clarify the trend as increasing or decreasing. b) It doesn't give specific examples that would illustrate the statement. c) It is a general statement that doesn't describe the relationship at all. 9) A straw in a glass of water looks bent because light bends. This makes the object appear to be in a slightly different location to the human eye than it actually is. What would you add to this response about why the straw looks bent? a) Light appears to bend because it changes speed when it enters or exits different media. b) This doesn't happen in the vacuum of space. c) This can also happen when you look at something that is at the bottom of a pool. 10) Convex mirrors form virtual images because the light rays scatter. What is lacking in this answer that would explain why convex mirrors form virtual images? a) How the light rays are interpreted by the eyes b) The apparent location of the image c) The angle of reflection as the light rays change media 11) When two light waves meet, they reinforce each other creating a super-crests or super-troughs. What critical information has been left out of this explanation of what happens when two light waves meet? a) The direction the light waves were traveling b) The speed at which the light waves were traveling c) The wavelengths of light that were meeting

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