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Physics Ch 29.4

cdeutsch/ursuline

QuestionAnswer
What is diffuse reflection? The reflection of light from a rough surface.
Do rays observe the law of reflection? Yes, each ray obeys the law of reflection.
What causes diffuse reflection? This kind of reflection is caused by the many different angles created by the rough surface cause reflection in many directions.
What is considered a polished surface? This kind of surface has small elevations that areless than about one-eighth the wavelength of the light that falls on the surface.
What kind of wavelengths can a polished surface reflect? Long wavelengths
What determines whether or not a reflector is diffused or polished? The wavelength of the waves it reflects
Give an example of a diffused reflector. Paper encounters millions of tiny flat surfaces facing in all directions, so they are reflected in all directions.
Give an example of a polished reflector. a smooth mirror is only reflected inone direction, an orderly pattern
When can an image be seen? An image is seen in a polished reflector because it can only be seen at certain angles.
Created by: cdeutsch