Advertisements
Advertisements
प्रश्न
How will you define threshold frequency?
उत्तर
For a given surface, the emission of photoelectrons takes place only if the frequency of incident light is greater than a certain minimum frequency called the threshold frequency.
APPEARS IN
संबंधित प्रश्न
A photoelectric surface is illuminated successively by monochromatic light of wavelength λ and `λ/2`. If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times that in the first case, the work function of the material is
The work functions for metals A, B and C are 1.92 eV, 2.0 eV and 5.0 eV respectively. The metal/metals which will emit photoelectrons for a radiation of wavelength 4100Å is/are
How does photocurrent vary with the intensity of the incident light?
What is a photocell?
Mention the different types of photocells.
What is a surface barrier?
Explain the effect of potential difference on photoelectric current.
Explain how frequency of incident light varies with stopping potential.
Explain experimentally observed facts of the photoelectric effect with the help of Einstein’s explanation.
UV light of wavelength 1800 Å is incident on a lithium surface whose threshold wavelength is 4965 Å. Determine the maximum energy of the electron emitted.
