Optical illusions work by using color, light, patterns and other variables to form pictures that deceive the brain. The eyes collect information that the brain attempts to understand, and the misleading information produces a perception that’s different from the objective reality.
Perception refers to an individual’s understanding of what he sees through the sense of sight. People usually see deceptive visual effects in physiological optical illusions, which are illusions resulting from a physical method.
Cognitive illusions, also called mind games, are illusions that happen when the brain instantly makes a perception according to the information received from the eyes. Some cognitive illusions are ambiguous, which means the objects in the illusions can be interpreted in different ways. Distortion of cognitive illusions involves various techniques to present objects of the same size or length in a contorted picture. Paradox illusions refer to images and objects that cannot occur in reality.
Many illusions are created by the refraction of light, which passes through substances at considerably different speeds. Light bends as it travels through a transparent channel, such as air, to another medium, such as water. For example, a pencil placed in a container filled with water appears bent at the surface, and a log that’s partly immersed in the water looks like it’s deformed.Learn More
One of the most common uses of infrared rays is for wireless communication, such as with garage door openers, car-locking systems and handheld remote controls for televisions and other appliances. Since all objects emit some degree of infrared radiation, night-vision devices make use of their sensitivity to infrared rays to capture and transmit images when there is no visible light source. Heat-seeking missiles also rely upon infrared technology to track their targets in passive missile-guidance systems.Full Answer >
A spectroscope relies on separating light into its component parts because of the information that can be obtained from examining the wider spectrum of colors that composes white light as it is reflected off an object. Such information can include elemental composition as well as how much of a particular element makes up the object that is being looked at.Full Answer >
Installation costs, the need for special testing equipment and susceptibility to damage are notable disadvantages of using fiber optics. Although fiber optics offers superior throughput speeds for data transmission, its disadvantages often make it unfeasible to implement.Full Answer >
All electromagnetic waves move at the speed of light; subsequently, the wavelength and frequency of waves must be proportional, as the wavelength multiplied by the frequency equals the speed of light. As wavelength increases, frequency decreases, and as wavelength decreases, frequency increases proportionally.Full Answer >