# Why do photographs in a book or magazine look grainy when magnified?

## What evidence can you cite for the wave nature of particles?

What evidence can you cite for the wave nature of light? For the particle nature of light? Diffraction, polarization, and interference are evidence of the wave nature of light; the photoelectric effect is evidence of the particle nature of light.

## Which are more successful in dislodge electrons from?

Which are more successful in dislodging electrons from a metal surface: photons of violet light or photons of red light? Why? Violet light is more successful because the higher energy of a violet photon interacts with a single electron and gives it enough energy to escape the metal.

## What is quantum of light called?

A quantum of light is called a photon. Planck’s constant, h, is the ratio of the energy of a photon to its frequency: E = hf, so h = E/f. Planck’s constant, therefore, determines how much energy is carried by a photon of light.18 мая 2009 г.

## Does the photoelectric effect support the wave theory of light the particle theory of light?

1 Answer. The photoelectric effect supports a particle theory of light in that it behaves like an elastic collision (one that conserves mechanical energy) between two particles, the photon of light and the electron of the metal.

## Why does light behave like a particle?

Quantum mechanics tells us that light can behave simultaneously as a particle or a wave. … When UV light hits a metal surface, it causes an emission of electrons. Albert Einstein explained this “photoelectric” effect by proposing that light – thought to only be a wave – is also a stream of particles.

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## Does light travel from one place to another in a wavelike or a particle like way?

Does light travel from one place to another in a wavelike or a particle-like way? Wavelike. Does light interact with a detector in a wavelike or a particle-like way? Particle-like.

## Which has more energy per photon red or blue?

Red photons of light carry about 1.8 electron volts (eV) of energy, while each blue photon transmits about 3.1 eV. … Ultraviolet radiation has shorter waves than blue or violet light, and thus oscillates more rapidly and carries more energy per photon than visible light does.

## Which experiment best demonstrates the particle like nature of light?

Which experiment best demonstrates the wave-like nature of light? double-slit experiment. In the photoelectric effect, the brighter the illuminating light on a photosensitive surface, the greater the: number of ejected electrons.

## What is the theory of light theory of particle theory?

In 1905, Albert Einstein proposed the wave-particle theory of electromagnetic radiation. This theory states that electromagnetic energy is released in discrete packets of energy—now called photons—that act like waves. After Einstein presented his theory, scientists found evidence to support it.

## What are the 4 quantum mechanics?

Broadly speaking, quantum mechanics incorporates four classes of phenomena for which classical physics cannot account: quantization of certain physical properties. quantum entanglement. principle of uncertainty.

## What is the smallest quantum of light called?

Light quanta, called photons, are the smallest discrete amounts of light. For light quanta, we use the formula the energy of a photon = planck’s constant x frequency.

## How can a photon have energy but no mass?

Since photons (particles of light) have no mass, they must obey E = pc and therefore get all of their energy from their momentum. … But an object with zero energy and zero mass is nothing at all. Therefore, if an object with no mass is to physically exist, it can never be at rest. Such is the case with light.

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## What proves light is a particle?

Quantum view of light: The photoelectric effect introduced evidence that light exhibited particle properties on the quantum scale of atoms. At least light can achieve a sufficient localization of energy to eject an electron from a metal surface.

## Is light a wave or a particle?

Light Is Also a Particle!

Now that the dual nature of light as “both a particle and a wave” has been proved, its essential theory was further evolved from electromagnetics into quantum mechanics. Einstein believed light is a particle (photon) and the flow of photons is a wave.