photons and electrons

Question 1

What is threshold frequency

Answer 1

the minimum frequency of incident radiation at which electrons will be emitted for a particular metal

Question 2

Work Function

Answer 2

The minimum amount of energy needed to emit an electron from the surface of a particular metal

Question 3

What will happen if you increase the intensity of the light

Answer 3

Increases the number of emitted electrons and increases the current of the system

Question 4

What happens if the frequency increases

Answer 4

as the frequency increases the energy of each photon of light increases.
increasing the frequency increases the kinetic energy that means increasing the velocity
frequency does not effect the current

Question 5

Explain the source of atomic emission spectra and their unique relationship to each element

Answer 5

Every atom has its own distinct set of energy levels. When gas is heated, electrons absorb every energy and move to a higher energy level further from the nucleus when the electrons fall back down they release the energy they absorbed in the form of light

Question 6

Relate the line on the atomic spectrum to electron transitions between energy levels

Answer 6

Each transition between energy levels result in the emission of a photon with a particular wavelength. The larger the transition the more energy and the lower the wavelength

Question 7

What is the significane of the photoelectric effect

Answer 7

it establishes the quantum theory an illustrates the particle nature of light

Question 8

Define the photoelectric effect

Answer 8

the process that occurs when light shines on a metal and electrons are ejected