| Nanotechnology is a field of science that involves the application of light waves, which are measured in nanometers. Light can be used for many applications such as scanning your products at a supermarket. This can assist with inventory control and pricing. Another application of light is at the airport gate where your ticket and seat assignment are verified. Manufacturers and industrialists use light to produce accurate and reproducible products. Light can be used to measure pollution, map the DNA code, or produce a light show. These are but a few of the many beneficial uses of light. Their application falls under a growing field of engineering called optics.
An understanding of light and optics can improve many other scientific endeavors, as well. In medicine, we use light to remove pigmented lesions, smooth skin surfaces, remove hair, and evaluate tiny cracks or crevasses on the human body. In hair restoration surgery, we have found that polarized light improves the visualization of hair and green light accentuates the openings we make in the skin by making the openings appear black. We have also found that the principals of refraction, color addition, color subtraction, diffraction, and reflection help to improve the visualization of white hairs. All these principals involve the science of nanotechnology and are inherently important to the field of hair restoration surgery.
In this photo we see all the principals of light that we use in hair restoration surgery. This is the same view from the same window taken at different times of day. During the daylight hours the windows transmit the light from outside. The color and shapes of the outside buildings are transmitted. As the light hits the windows it passes from air to a more dense medium and the light refracts. At night the light from the inside is reflected and the color and shapes of the chairs from inside the window are visible. No images from outside the window are visible at night from this perspective and view.
The electromagnetic spectrum ranges form short wave length, high frequency gamma rays to long wavelength, low frequency radio waves. The spectrum we are most concerned with in this paper is the visible wavelengths what range from roughly 400 to 700 nanometers in length. Violet light is at the lower wavelength and higher frequency, while red light is at the longer wavelength and lower frequency.
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