Physics-adaptive Reflectance
Physics-adaptive Reflectance - Related Videos
13:59
Reflection and Refraction
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2023
Source: Derek Wilson, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Light travels at different speeds depending on the material through which it is propagating. When light travels from one material to another, it will either slow down or speed up. In order to conserve energy and momentum, the light must change the direction in which it propagates. This bending of light is known as refraction. Some fraction of the...
07:16
Physical Properties Of Minerals II: Polymineralic Analysis
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2023
Source: Laboratory of Alan Lester - University of Colorado Boulder The physical properties of minerals include various measurable and discernible attributes, including color, streak, magnetic properties, hardness, crystal growth form, and crystal cleavage. These properties are mineral-specific, and they are fundamentally related to a particular mineral’s chemical make-up and atomic structure. This video examines several physical properties that are useful in field and hand sample mineral...
05:21
General Approach to the Physical Exam
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2023
Source: Jaideep S. Talwalkar, MD, Internal Medicine and Pediatrics, Yale School of Medicine, New Haven, CT The examination of the body is fundamental to the practice of medicine. Since the Roman Empire, physicians have described the connection between alterations in function of specific parts of the body and specific disease states and have sought to further scientific understanding to improve bedside diagnosis. However, in this modern age of increasing technology within medical diagnostics, it...
02:57
The Sense of Self: Reflected Self-Appraisal and Social Comparison
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2020
According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...
02:57
Physical and Chemical Properties of Matter
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2020
The characteristics that enable us to distinguish one substance from another are called properties. Physical Properties of Matter A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. We can observe some physical properties, such as density and color, without changing the physical state of the matter...
FAQs
The reflected signal changes when an environmental stimulus modifies one or more optical properties of the system. Illumination, temperature, strain, or pressure can alter refractive index, geometry, absorption, scattering, or interference. Viewing angle provides another control variable. Engineering designs can therefore tune either reflected intensity or spectral content, depending on which property is most responsive.
Passive designs rely on environmental conditions to trigger their optical response, while actively controlled systems deliberately regulate that response. The distinction determines how the system interacts with its surroundings: a passive surface responds directly to conditions such as temperature or illumination, whereas an actively controlled optical system can adjust its reflected output through intentional control of the relevant physical state.
These properties provide different mechanisms for changing reflected light. A refractive-index change can modify how light propagates and reflects, while a geometric change can alter the surface configuration seen by the light. Absorption and scattering affect the amount redirected or retained, and interference can alter spectral content. Selecting among these mechanisms links a specific physical change to a measurable optical response.
A useful design workflow connects the physical stimulus, the material or structural property it changes, and the resulting optical output. Engineers can identify whether illumination, temperature, strain, pressure, or viewing angle is the input, then determine whether refractive index, geometry, absorption, scattering, or interference provides the response. This linkage supports purposeful tuning of intensity or spectrum.
Applications include adaptive coatings, optical sensors, thermal-control surfaces, variable-appearance materials, and imaging components. In each case, the reflected light provides an output that changes with a relevant physical condition or control state. The same design principle can therefore support environmental response, optical measurement, energy management, appearance control, or improved imaging performance.
A measurable change in reflected intensity or spectrum can indicate that a physical condition has changed, allowing the optical response to serve as a sensing output. On thermal-control surfaces, adaptive reflection can also support energy management by changing how the surface interacts with light. These outcomes arise from linking physical changes to optical behavior rather than treating reflectance as fixed.