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Electromagnetic Waves and Optics Review Questions: 1. Calculate the range of frequencies in the electromagnetic spectrum that correspond to visible radiation. The range of wavelengths is 400 nanometers to 700 nanometers (0.0000004 m to 0.0000007 m). Frequency Wave Speed 3 10 8 m/s 7.5 10 14 Hz, and Wavelength 400 10 9 m Frequency Wave Speed 3 10 8 m/s 4.3 10 14 Hz Wavelength 700 10 9 m Find the position of the image of the object shown by tracing at least two light rays that leave the object hit the reflecting or refraction surface and enter your eyes. Indicate whether the image is virtual or real. When determining the path of the light rays, be sure to use the normal as a reference. 2. Reflection from a plane mirror: object i’ i i i’ mirror normal normal virtual image 3. Reflection from a convex mirror: normal i’ i object virtual image C i normal i’ 4. Reflection from a concave mirror: normal i’ i i’ i C normal object virtual image 5. Reflection from a concave mirror: normal i i’ object C i i’ real image normal In the following questions a light ray (or rays) leave an object and travel toward a boundary between two materials. Trace their paths as they cross the boundary (or boundaries). 6. air-water boundary – object in air: object normal normal air water 7. water-air boundary – object in water: normal normal normal air water total internal reflection object 8. ray traveling in air, then glass, and then air again: normal normal object air glass air