Question

Which of the following was most clearly, even uniquely perhaps, revealed by the discovery of the photoelectric effect?

1. the Heisenberg Uncertainty Principle (the
indeterminate, probabilistic character of nature)

2. energy/quantization

3. wave/particle duality

4. superconductivity

5. relativity

Answer 1

Answer : Option 3) Wave/Particle duality.

Explanation : The experiment on discovery of photoelectric effect revealed about the photoelectrons of light that can behave as particle or waves.

The photoelectric effect is observed when the emission of electrons or other free carriers occurs on shining a light radiation on a material. The electrons emitted from this can be called photo electrons. These photoelectrons may behave as wave or particle in duality which holds that light and matter exhibit properties of both waves and of particles.

Answer 2

The discovery of the photoelectric effect reveals$\boxed{{\text{3}}{\text{.}}\;{\text{wave - particle duality}}}$.

Further explanation:

Photoelectric effect is the phenomenon in which metals having certain minimum frequency emits electron when exposed to electromagnetic radiation. The electrons emitted are called as photoelectrons.

The electrons are emitted as a result of absorption of energy from electromagnetic radiation of high frequency. Electromagnetic radiation such as ultraviolet light excites electrons to higher energy level called as an excited state of electrons.

Some features of photoelectric effects are written as follows:

1. The energy of photon is proportional to frequency of light.

2. A certain minimum frequency called as threshold frequency is needed by metal to emit electrons below which no electron are emitted. It is denoted by ${\nu }}_{\text{o}}}$.

3. Kinetic energy of electron is proportional to frequency of electromagnetic radiation.

4. Number of electrons emitted per second is proportional to intensity of light.

Wave-particle duality is the phenomenon in which photon exhibit properties of both particle and wave.

According to photoelectric effect, light can exhibit both particle as well as wave nature. Each photon carries definite amount of energy that is directly proportional to frequency and behaves as a particle.

On the other hand, when light hits metal surface having certain minimum frequency it causes emission of electrons. The minimum amount of energy and frequency translates into a maximum wavelength. Therefore light propagates and interacts with metal surface to eject electron as it is a wave.

Hence the phenomenon of wave-particle duality is best revealed by discovery photoelectric effect.

Learn more:

1. What is the charge associated with each molecule of HCl https://brainly.com/question/5288267

2. Write the chemical equation https://brainly.com/question/8926688

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Photoelectric effect

Keywords: Photon, photoelectric effect, energy, metals, light, particle, electromagnetic radiation, frequency, threshold frequency, kinetic energy and wave-particle duality.