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Articles

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Diagram pages

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Definitions

This section contains an index of all DEFINITIONS in the DICTIONARY:

Electromagnetic energy

Electromagnetic field

Electromagnetic force

Electromagnetic force: manifestations

Electromagnetic force: properties

Electromagnetic interaction

Electromagnetic radiation

Electromagnetic spectrum

Electromagnetic wave

Electromagnetism

Electron

Electron cloud

Electron excitation

Electron mass

Electron orbital

Electron properties

Electron transition

Electron-electron interaction

Electronvolt

Electrostatic & magnetic force

Element

Elementary particle

Emission

Energy

Excitation of quantum fields

Fast medium

Fermat’s principle

Field

Fluorescence

Force

Force carrier

Fovea

Free electron

Frequency

Fundamental forces

Gamma correction

Gamut

Ganglion cells

Geometric raindrop

Gravitational force

Greyscale colour model

Hertz (Hz)

Hexadecimal notation

Horizontal cell

HSB colour model

HSB colour values

HSL colour model

Hue

Illuminance

Illumination

Incandescence

Incident light

Index of refraction

Intensity

Interference

Internal reflection

Interneuron

Joule

Kinetic energy

Laser

Lateral geniculate nucleus

Law of refraction

Light

Light emitting diode

Light source

Light sources

Light stimulus

Light wave

Light-emitting process

LMS colour space

Luminance

Luminescence

Luminosity

Magnetic field

Mass

Material

Material thing

Matter

Medium

Metameric

Summaries

This section contains an index of all SUMMARIES in the DICTIONARY:

Questions & answers

This section contains an index of all the Q&A entries in the DICTIONARY:

How is frequency affacted as light travel from air into raindrops?

How is the angle of reflection measured on a ray-tracing diagram?

How is the frequency of an electromagnetic wave calculated?

How is the refractive index of a medium calculated?

How is the refractive index of a medium related to the speed of light?

How is wavelength affacted as light travel from air into raindrops?

How is wavelength affected as light travel from air into glass or water?

How many different colours can the human eye see in ideal conditions?

How many Kilohertz are the in one Hertz?

How many nanometres in a metre?

How many primary colours in an RGB colour wheel?

How many secondary colours in an RGB colour wheel with six colours?

How many tertiary colours are there in the RGB colour model?

How many times is a ray of sunlight reflected inside one of the raindrops that form part of a primary rainbow?

How many times is sunlight reflected inside one of the raindrops that form part of a secondary rainbow?

If the refractive indices are known, can the angle of refraction be calculated for a ray of light travelling from one medium to another?

In the field of optics, what is meant by a ray or a ray of light?

In which colour model is cyan a primary colour?

In which colour model is cyan a secondary colour?

In which colour model is magenta a primary colour?

In which colour model is magenta a secondary colour?

Is a colour space the same as a colour model?

Is a fast medium optically denser than a rare medium?

Is a photon a particle or a wave?

Is a photon a particle?

Is a rainbow is an optical phenomenon?

Is a secondary rainbow wider than a primary rainbow measured from red to violet?

Is Alexander’s band the area between a primary and secondary rainbow?

Is an electromagnetic wave the same as a light wave?

Is an electronvolt the unit used to measure the energy carried by electromagnetic radiation?

Is chromatic dispersion the result of refraction?

Is cyan a spectral colour?

Is every colour on an additive colour wheel produced by mixing hues at maximum brightness and saturation?

Is every observer’s experience of colour different?

Is it only spectral colours that produce the impression of bands of colour?

Is light visible as it travels through a vacuum?

Is magenta a spectral colour?

Is optical density the same as the physical density of a medium?

Is sunlight composed of waves or particles?

Is sunlight polarized as it undergoes refraction and reflection in a raindrop?

Is the centre of a rainbow always below the horizon when an observer looks over water or level ground?

Is the cornea the transparent surface of the eye that covers the iris and pupil?

Is the outermost colour the same for both primary and secondary rainbows?

Is the visible spectrum composed of a continuous range of colours from red to violet?

Is visible light a form of electromagnetic radiation?

Is wavelength measured between the crests of waves?

Lower frequency = longer or shorter wavelengths?

Name six bands of colour in the visible spectrum starting with red?

Name the three additive primary colours.

Name the three RGB primary colours that can together produce white light?

Name three colours and their corresponding wavelengths of light that when see together make white?

Name three colours of light that added together make white?

Name two colours with the longest wavelengths?

Name two colours with the shortest wavelengths?

Name two of the prefixes used to subdivide metres into smaller units when measuring the wavelength of electromagnetic waves?

Shorter wavelength = higher frequency or lower frequency?

What angle does a primary rainbow appear at from its centre?

What are additive primary colours?

What are analogous colours?

What are interneurons?

What are non-spectral colours?

What are other names for solar radiation?

What are other names for sunlight?

What are rainbow colours?

What are secondary colours?

What are spectral colours?

What are supernumerary rainbows?

What are the best times of day to see a rainbow?

What are the causes of electric and magnetic fields?

What are the colours associated with the visible spectrum?

What are the main parts of an atom?

What are the preconditions for seeing a rainbow?

What are the secondary colours produced by the RYB colour model?

What are the three CMY primary colours?

What are the three primary colours in the RGB colour model?

What are the three primary colours when starting an RGB colour wheel?

What are the three RYB primary colours?

What are the three secondary colours when building an RGB colour wheel?

What are the tiny building blocks of everything around us?

What are the two fields that form an electromagnetic wave?

Images

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