Dictionary of light, colour & vision

Alexander’s band

Alexander's band, also known as Alexander's dark band, is an optical phenomenon observed in rainbows. It refers to the region between the primary and secondary bows, which often appears noticeably ...

Amacrine cell

Amacrine cells are interneurons in the human retina within the eyeball that interact with retinal ganglion cells and/or bipolar cells. Amacrine cells are an example of neurons which are the ...

Amacrine cell functions

About amacrine cell functions Amacrine cells are a type of neuron found in the retina, the light-sensitive tissue lining the back of the human eye. They play a critical role ...

Amacrine cells

Amacrine cells are interneurons in the human retina that interact with retinal ganglion cells and/or bipolar cells. Amacrine cells are a type of interneuron within the human retina. Amacrine cells ...

Amacrine cells

Amacrine cells Amacrine cells interact with bipolar cells and/or ganglion cells. They are a type of interneuron that monitor and augment the stream of data through bipolar cells and also ...

Amplitude

The amplitude of an electromagnetic wave is directly connected with the amount of energy it carries. In a wave diagram, amplitude is represented as the distance from the center line ...

Amplitude

The amplitude of an electromagnetic wave is directly connected with the amount of energy it carries. In a wave diagram, amplitude is represented as the distance from the centre line ...

Amplitude, brightness, colour brightness & intensity

About amplitude, brightness, colour brightness and intensity The terms amplitude, brightness, colour brightness and intensity are easily confused. In this resource: Amplitude Amplitude refers to the amount of energy carried ...

Analogous colours

Analogous colours are colours that are very similar to one another and appear next to each other on a colour wheel. Analogous colours are colours with similar hues. An example ...

Analogous colours

Analogous colours are colours that are very similar to one another and appear next to each other on a colour wheel. Analogous colours are colours with similar hues. An example ...

Angle of deflection

The angle of deflection measures the angle between the original path of a ray of incident light prior to striking a raindrop and the angle of deviation which measures the ...

Angle of deflection

When discussing the formation of rainbows, the angle of deflection measures the angle between the initial path of a light ray before it hits a raindrop, and the angle of ...

Angle of deflection

When discussing the formation of rainbows, the angle of deflection measures the angle between the initial path of a light ray before it hits a raindrop, and the angle of ...

Angle of deviation

(1) The angle of deviation measures the angle between the direction of an incident ray and the direction of a refracted ray when light travels from one medium to another ...

Angle of incidence

The angle of incidence measures the angle at which incoming light strikes a surface. When light is travelling towards something it is said to be incident to that surface or ...

Angle of incidence

The angle of incidence refers to the angle at which incoming light strikes a surface and is measured between a ray of incoming light and an imaginary line called the ...

Angle of reflection

The angle of reflection is the angle between the incident light ray and the reflected light ray, both measured from an imaginary line called the normal. According to the law ...

Angle of reflection

The angle of reflection measures the angle at which light rebounds from a surface after being reflected. The angle of reflection is measured between a ray of light which has ...

Angle of refraction

The angle of refraction indicates the extent to which light bends and changes direction as it passes from one transparent medium into another. The angle of refraction is measured between ...

Angle of refraction

The angle of refraction measures the angle to which light bends as it crosses the boundary between different media. The angle of refraction is measured between the bent ray and ...