Violet has the highest frequency of visible light.
Dictionary category: Question
Which has the longest wavelength, red or violet light waves?
Red has the longest wavelength whilst violet has the shortest.
Which has the shortest wavelength, a radio wave or a gamma ray?
Gamma rays have a shorter wavelength than radio waves.
Why are rainbows curved?
Why are rainbows sometime represented as cones of colour?
Rainbows are sometimes represented as cones of colour because raindrops from directly in front of an observer to those in the far distance can all help to produce the resulting bows of colour.
Why are RGB colours usually arranged as a colour wheel?
Because a colour wheel demonstrates the effect of mixing different proportions of the three RGB primary colours – red, green and blue!
Why do objects appear to be different colours to an observer?
Because different wavelengths of light are reflected off the surface of objects. Every surface has unique properties.
Why do our eyes respond well in sunlight?
Our eyes respond so well to sunlight because of its intensity and because it contains all wavelengths of visible light.
Why do overlapping wavelengths of light corresponding with cyan, magenta and yellow make white?
Overlapping wavelengths of light corresponding with cyan, magenta and yellow make white because, when reflected off a neutral coloured surface, each adds more wavelengths to the reflected light.
Why do rainbows appear as bands of colour?
Rainbows appear as bands of colour because our eyes tend to see some wavelengths of light as being brighter and so more distinct than others.
Why does the refractive index of a vacuum = 1?
The refractive index of a medium is calculated by dividing the speed of light in a vacuum by the speed of light as it propagates through another medium.
So the refractive index of a vacuum = 1 because the speed of light in a vacuum divided by the speed of light in a vacuum = 1.
Why is it useful to think of the bands that form a rainbow as discs of colour?
It is useful to think of the bands that form a rainbow as discs of colour because the brightness of any specific colour seen by an observer drops off to nothing at the circumference but drops off more slowly towards the centre.
Why is light colourless
Although pure white light is perceived as colourless, it actually contains all colours in the visible spectrum.
Why is sunlight important to human beings?
Why is the CMYK colour model used for printing?
The CMYK colour model is used for printing because cyan, magenta and yellow inks are relatively more transparent than red, green and blue inks so reflect more light and produce brighter prints.
Why is there a blind spot in the human eye?
The blind spot in the human eye corresponds with the point in the retina where the optic nerve exits and the central artery enters the eyeball.