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.
The optical density of a substance is also referred to as the index of refraction of the substance. This indicates the number of times the speed of light is reduced in that substance compared to its speed in vacuum. The speed of light in vacuum is 3 x 10^8 meters per second.Learn More
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 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.Full Answer >
According to HowStuffWorks, optical cables work by lining the inside of a wire with thin strands of glass and coating those strands of glass with two layers of plastic. The plastic creates a mirror-like effect around the glass that allows for internal reflection to help light travel through the optic strands.Full Answer >
Linear density is the amount of mass for every unit of length. This is an attribute commonly associated with one-dimensional objects, although it can also be used in referring to the density of a three-dimensional quantity for a specific dimension.Full Answer >