Photoelectric Effect
Physics ⇒ Modern Physics
Photoelectric Effect starts at 10 and continues till grade 12.
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See sample questions for grade 10
A metal has a work function of 2.5 eV. Light of wavelength 400 nm is incident on it. Will photoelectrons be emitted? (h = 6.63 × 10-34 J·s, c = 3 × 108 m/s, 1 eV = 1.6 × 10-19 J)
A metal surface is illuminated with light of frequency 1.5 × 1015 Hz. The threshold frequency for the metal is 1.0 × 1015 Hz. If h = 6.63 × 10-34 J·s, what is the maximum kinetic energy of the photoelectrons?
Calculate the energy of a photon with frequency 6 × 1014 Hz. (Planck's constant h = 6.63 × 10-34 J·s)
Explain why the photoelectric effect cannot be explained by the classical wave theory of light.
Explain why ultraviolet light can cause photoemission from a metal, but red light cannot, even if both have the same intensity.
If the frequency of incident light is doubled, what happens to the energy of each photon?
If the frequency of incident light is just equal to the threshold frequency, what is the kinetic energy of the emitted photoelectrons?
If the intensity of incident light is doubled, what happens to the number of photoelectrons emitted?
If the work function of a metal is 2 eV and the energy of the incident photon is 3 eV, what is the maximum kinetic energy of the emitted photoelectron?
If the work function of a metal is 4 eV, what is the threshold frequency? (Planck's constant h = 4.14 × 10-15 eV·s)
Name the scientist who received the Nobel Prize for explaining the photoelectric effect.
State the effect of increasing the intensity of light on the kinetic energy of photoelectrons, keeping frequency constant.
State the equation for the maximum kinetic energy of photoelectrons according to Einstein's photoelectric equation.
The energy of a photon is given by the formula E = hν. What does 'h' represent?
The photoelectric effect is evidence for which model of light?
What happens to the stopping potential if the frequency of incident light increases, keeping intensity constant?
What is meant by the term 'photoelectron'?
What is the effect of increasing the frequency of incident light above the threshold frequency on the kinetic energy of photoelectrons?
What is the minimum energy required to remove an electron from the surface of a metal called?
What is the significance of the photoelectric effect in the development of modern physics?
