The German physicist Max Planck proposed a quantum theory of radiation to counter some of the difficulties associated with the wave theory of light, and in 1905 Einstein proposed that light is composed of quanta (later called photons).
Ibn Sina also wrote extensively on Greek, Persian and Indian medicine, conducted his own research on contagious diseases and anatomy, and was well ahead of his time with the insight that light is composed of particles, which Newton later described and Einstein proved.
Einstein showed that these results can be explained by two assumptions: (1) that light is composed of corpuscles or photons, the energy of which is given by Planck's relationship, and (2) that an atom in the metal can absorb either a whole photon or nothing.
Newton also discovered that white light is composed of a spectrum of colors, and he invented the reflecting telescope.
A mathematician and physicist at Cambridge University, he discovered the Law of Universal Gravitation, began to develop calculus, and discovered that white light is composed of every color.
Ordinary light is composed of all the colours in the visible region, but laser light is of a single colour or monochromatic.
Light is composed of electromagnetic energy of different wavelengths.
Isaac Newton, in Opticks (1704), published his discovery that white light is composed of colors - the colors in Rainbows.
Newton argued that light is composed of particles or corpuscles, which were refracted by accelerating into a denser medium.
From this, Anderson reasoned that all the personnel should have colours for names so as to form the whole "Spectrum" of colours, and decided that someone called "White" should be the leader of the Spectrum Organisation, much in the same way that white light is composed of, and can be broken down into, the colours of the spectrum.
