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.Know More
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 about Optics & Waves
The optical density of a substance is the logarithmic ratio of the intensity of transmitted light to the intensity of the incident light passing through the substance. It is otherwise measured as the absorbed radiation of the corresponding wavelength. Optical density refers to the absorbance of a substance.Full Answer >
Optical devices include magnifying lenses, spectacles, binoculars, microscopes, telescopes and lasers. Optical devices manipulate light waves to aid in viewing or analyzing those waves to determine properties of the object in view.Full Answer >
Optical illusions are caused by a mismatch of what the eyes see and what the brain interprets, according to ABC News. The brain is often tricked into thinking something is moving when contrasting colors are placed in close proximity to each other and repeated. This is why when people want a pattern to move like an optical illusion, the shapes of the pattern are outlined in black and white.Full Answer >
Commercial optical fiber cables use highly purified glass for their cores, glass or polymers for their cladding, and polyurethane for their jackets. Some optical fiber cables use plastic cores, which are cheaper; however, this type of cable has a higher signal loss and works at shorter ranges than glass. Both types transmit light signals using reflection along the axis of the core.Full Answer >