The dual nature of light refers to the fact that light can act as both a wave and a particle. Albert Einstein's photoelectric effect experiment proves that light can behave as a particle while Thomas Young's double-slit experiment shows that it also behaves as a wave.Continue Reading
In 1905, Einstein proved that light could behave as a particle by showing that a beam of light could eject electrons from metal. This suggested that light consisted of photons that could eject electrons of similar frequency. Einstein's discovery altered the prevalent theory at the time, which held that light was only a wave.
Proof that light could act as a wave was demonstrated as early as 1801 by Young. In his experiment, Young shone light between two parallel slits, causing the light waves to interfere with each other and form a patter of dark and light bands. If light was primarily a particle, it would have formed two parallel lines.
Quantum mechanics explains the duality of light by describing it as a wave-packet. A wave-packet refers to waves that may interact either as spatially localized, acting as particle, or interacting like waves. This means light photons can either act as a particle or wave, depending on the circumstances.Learn more about Optics & Waves
According to siplab, the equation to calculate wave particle velocity is w = c/f. For the calculation, use v = w*f to figure out the velocity, where w is the wavelength, f is the frequency of the source, c is the constant speed of sound and v is the particle velocity.Full Answer >
A particle of light is called a photon, which is a small particle made up of electromagnetic radiation. These particles have no charge or resting mass, but travel at the speed of light. The energy of photons cannot be divided, thus they are often referred to as energy packets.Full Answer >
The most significant difference between light and sound is that light is a transverse wave while sound is a longitudinal wave. As a transverse wave, light is capable of traveling in a vacuum, which is how the light from the sun is able to reach the earth.Full Answer >
Waves travel by transferring energy from particle to particle through a medium such as air or water. In some cases, this energy transfer creates a motion perpendicular to the direction of travel, creating transverse waves. Other waves travel by compressing the medium and creating motion parallel to the direction of movement, such as the longitudinal waves that transmit sound through the air.Full Answer >