The photoelectric effect shows that light is made up of individual photons. Photoemissions will take place if photons have a high enough frequency and have enough energy.
Which statement best describes the photoelectric effect?
Emission of electrons from a metal absorbing photons of electromagnetic radiation
Conduction of electrons in a metal due to the movement of photons of electromagnetic radiation
Emission of photons of electromagnetic radiation due to the absorption of electrons
Which of the following combinations is most likely to emit photoelectrons?
Positively charged zinc plate illuminated by ultraviolet light
Negatively charged zinc plate illuminated by ultraviolet light
Negatively charged zinc plate illuminated by intense white light
What is the energy of a photon of frequency 5.7 x 1014 Hz?
3.78 x 10-19 J
8.59 x 1047 J
3.78 x 1049 J
What is the work function of a metal which has a threshold frequency of 4.8 x 1014 Hz?
3.18 x 10-19 J
7.24 x 1047 J
3.18 x 1049 J
Calculate the velocity of an electron emitted by radiation of frequency 5.7 x 1014 Hz from a metal with a work function of 3.18 x 10-19 J?. The mass of an electron is 9.11 x 10-31 kg.
2.56 x 105 ms-1
3.63 x 105 ms-1
1.31 x 1011 ms-1
Why is the photoelectric effect not due to ionization?
It only occurs with a negatively charged plate
It requires electromagnetic radiation
It allows electrons to move
What aspect of wave particle duality is shown by the photoelectric effect?
Light is made up of particles
Particles can behave like waves
Waves can behave like particles
What is the name of the constant h in the equation E = h f?
The quantum number