# What Are The Theories Of Light Class 10

## What are the light Class 10 theories?

Two theories can be used to explain light. In the seventeenth century, two competing theories about the nature of light were put forth: the corpuscular theory and the wave theory. Light has a wave-like quality, and according to Huygens, it moves as a longitudinal wave through a substance called ether. Christiaan Huygens, a Dutch astronomer and mathematician, developed the first comprehensive wave theory of light in his 1690 treatise Traité de la Lumière, from which he also deduced the laws of reflection and refraction.According to Newton’s corpuscular theory, light is a stream made up of numerous corpuscles. Refraction and reflection could be explained by this theory, but interference, polarization, and diffraction were left unaddressed because these phenomena are connected to the wave nature of light.The corpuscular (or particle) theory of Sir Isaac Newton and the wave theory of Christian Huygens were the two most influential theories of light. According to Newton’s corpuscular theory, light is made up of particles that move in straight lines.Light has two distinct characteristics. Light travels in straight lines because it occasionally behaves like a particle (a photon). When explaining how light bends (or diffracts) around an object, it can occasionally behave like a wave.

## What is the well-known theory of light?

According to Huygens’ theory from 1678, the spherical wave itself originates at every point where a luminous disturbance meets that point. What shape the new wave will take is determined by the sum of the secondary waves, which are a result of the disturbance. The Huygens’ Principle is the name given to this theory of light. Huygens proposed that light is a longitudinal wave in the aether medium, which permeates the entire cosmos. A wavefront is a collection of particles that oscillate in phase with one another.Huygens’ wave theory states that waves, or wavefronts, are how light moves through a medium. The location where every particle vibrates in unison with one another is referred to as a wavefront. The behavior of every particle on a wavefront is that of a secondary source of light that emits secondary wavelets.In the aether medium, which permeates the entire universe, Huygens proposed that light is a longitudinal wave. A wavefront is a collection of particles that oscillate in unison. Spherical wavefronts are produced by point sources while plane wavefronts are produced by infinity sources.

## Quantum theory of light first appeared when?

Einstein’s quantum theory of light, which postulated that light is composed of tiny particles known as photons and that these quantum particles are capable of exhibiting wave-like properties, was one of the major innovations he proposed in 1905. As a result of German physicist Max Planck’s groundbreaking research on how radiation affects a substance known as a blackbody, the quantum theory of modern physics is established.Two of the pioneers of quantum theory, Niels Bohr and Max Planck, each won the Physics Nobel Prize for their research on quanta.At the University of Göttingen in the early 1920s, a group of physicists led by Max Born, Werner Heisenberg, and Wolfgang Pauli coined the term quantum mechanics, which was first used in Born’s 1924 paper Zur Quantenmechanik.Energy can be quantized, according to Albert Einstein, who received the Nobel Prize for this discovery. Energy is only available in multiples of the same quanta, just as you can only buy shoes in multiples of half a size. This is how quantum physics gets its name.

## What do you mean by the quantum of light?

An electromagnetic radiation photon, also known as a light quantum, is a tiny energy packet. The phenomenon of light diffraction was discovered in 1665 and noted as resembling wave behavior by Italian physicist Francesco Maria Grimaldi (1618–1663). Later, in 1678, Dutch physicist Christian Huygens (1629–1695) announced the Huygens’ principle and established the wave theory of light.Two theories can be used to explain light. In the seventeenth century, two competing theories about the nature of light were put forth: the corpuscular theory and the wave theory. Light has a wave-like quality, according to Huygens, and it moves as a longitudinal wave through a substance called ether.According to Einstein’s quantum theory of light, light is made up of tiny energy packets called photons that behave like waves. Albert Einstein included an explanation of the electron emission process from lightning-struck metals in this theory.There was a discussion about what constitutes light in the seventeenth century. Isaac Newton asserted that light is a particle, whereas Christiaan Huygens thought it is a wave. Newton’s particle theory prevailed and was acknowledged for more than a century, largely because of his well-established reputation.