No! Both crown glass and diamonds are described as being slow media because they significantly reduce the speed of light.
Dictionary category: Question
Are dispersion and diffusion the same thing?
No! Chromatic dispersion refers to the separation of white light into its component colours. Diffusion takes place when light is scattered in different directions because of impurities in a medium or irregularities on its surface.
Are rainbow colours spectral colours?
Are red, green and blue used to produce secondary colours when using the RGB and HSB colour models?
Yes! The primary colours red, green and blue are used to produce secondary colours when using the RGB and HSB colour models.
Are RGB and HSB both additive colour models?
Yes! Both RGB and HSB are additive colour models.
Are the colours in primary and secondary rainbows always in reverse order?
Yes! The colours of primary and secondary rainbows are always in the opposite order.
Are the colours of a secondary rainbow in reverse order compared with a primary rainbow?
Yes! The colours of a secondary rainbow are in reverse order compared with a primary rainbow.
Are the colours ROYGBV produced by different wavelengths of light?
Yes! ROYGBV are all spectral colours and so each one can be produced by a single wavelength of light.
Are the rainbow colours ROYGBV analogous colours?
No! Analogous colours are colours with similar hues.
Are the Sun, observer and anti-solar point all on the rainbow axis?
Yes! When drawing a diagram showing where a rainbow will appear, the Sun, observer and anti-solar point are all on the rainbow axis.
As frequency increases does wavelength decrease in length?
Yes! As the frequency of oscillations of an electromagnetic wave increase the wavelength decreases.
Can a rainbow be seen at any time of the day?
No! To see an atmospheric rainbow the Sun must not be too high in the sky. If the Sun is too high then the entire rainbow can be below the horizon.
Can a rainbow form a circle?
Yes! A rainbow can form a complete circle when seen from a plane.
Can a rainbow form a complete circle if seen from a plane?
Can all the colours in a colour wheel be produced by mixing pairs of primary colours in different proportions?
Yes! Every colour in a colour wheel can be produced by mixing the three pairs of primary colours in different proportions.
Can an observer see both spectral and CMY colours at the same time?
Can light travel through a vacuum?
Yes! Light can travel through the air and solid materials but also through the vacuum of space.
Can orange, yellow and violet be produced by combining pairs of the spectral colours red, green and blue?
Yes! The spectral colours red, green and blue can be combined in pairs to produce orange, yellow and violet when using an additive colour model.
Can spectral colours be arranged in a band with red at one end and violet at the other?
Yes! When spectral colours are arranged in a diagram, the order in which they appear corresponds with their wavelength. The easiest way to show this is a band of colours of increasing wavelength with red at one end and violet at the other.
Can the spectral colours red, green and blue be produced by combining other wavelengths of light?
No! Red, green and blue are primary colours within additive colour models and can only be produced by a single wavelength of light.