No! Both crown glass and diamonds are described as being slow media because they significantly reduce the speed of light.
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.
Yes! Each colour in a rainbow between red and violet is a spectral colour.
Yes! The primary colours red, green and blue are used to produce secondary colours when using the RGB and HSB colour models.
Yes! Both RGB and HSB are additive colour models.
Yes! The colours of primary and secondary rainbows are always in the opposite order.
Yes! The colours of a secondary rainbow are in reverse order compared with a primary rainbow.
Yes! ROYGBV are all spectral colours and so each one can be produced by a single wavelength of light.
No! Analogous colours are colours with similar hues.
Yes! When drawing a diagram showing where a rainbow will appear, the Sun, observer and anti-solar point are all on the rainbow axis.
Yes! As the frequency of oscillations of an electromagnetic wave increase the wavelength decreases.
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.
Yes! A rainbow can form a complete circle when seen from a plane.
Yes! A rainbow can form a complete circle when seen from a plane, but from the ground, an observer usually sees the upper half of the circle with the sky as a backdrop.
Yes! Every colour in a colour wheel can be produced by mixing the three pairs of primary colours in different proportions.
Yes! An observer can see both a rainbow and colours produced by paints at the same time.
Yes! Light can travel through the air and solid materials but also through the vacuum of space.
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.
Yes! Other common media that produce rainbow-like effects include:
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.