Question

einsteins explanation for the photoelectric effect led to what major breakthrough in science? theory of general relativity energy quantization wave/particle - duality of light superconductivity question 4 1 pts you fire a beam of light at a piece of metal and determine that electrons are emitted with 2.0 ev of energy. you increase the wavelength of the light and determine that electrons are still being emitted. what else is true? there is an increase the speed of the emitted electrons. there is a decrease the speed of the emitted electrons. there is a decrease the number of electrons emitted. there is an increase the number of electrons emitted. question 5 1 pts light behaves like a particle a liquid at room temperature. both a particle and a wave. a wave.

Explanation:

1. Einstein's explanation of the photoelectric effect proposed that light consists of discrete packets of energy (photons), which led to the concept of the wave - particle duality of light. The theory of general relativity is a different concept related to gravity. Energy quantization has broader applications but the photoelectric effect specifically led to the wave - particle duality idea. Superconductivity is unrelated to the photoelectric effect.
2. The energy of a photon is given by $E = h\frac{c}{\lambda}$, where $h$ is Planck's constant, $c$ is the speed of light, and $\lambda$ is the wavelength. When the wavelength $\lambda$ increases, the energy of the photon $E$ decreases. Since the energy of the emitted electrons is related to the energy of the incident photons, a decrease in photon energy leads to a decrease in the kinetic energy (and thus speed) of the emitted electrons. The number of electrons emitted is related to the intensity of the light, not the wavelength.
3. Light exhibits both wave - like (e.g., diffraction, interference) and particle - like (e.g., photoelectric effect) properties, which is known as wave - particle duality.

Answer:

1. Wave/particle duality of light
2. there is a decrease the speed of the emitted electrons
3. both a particle and a wave