Physics · 2019
NEET 2019 · 20 May · Code G1 · Q179
The work function of a photosensitive material is 4.0 eV. The longest wavelength of light that can cause photon emission from the substance is…
The work function of a photosensitive material is $\displaystyle 4.0$ eV. The longest wavelength of light that can cause photon emission from the substance is (approximately)
Official answer
(4)
$\displaystyle 310$ nm
More from Dual Nature of Radiation and Matter
- Photons with energy 5 eV are incident on a cathode C in a photoelectric cell. The maximum energy of emitted photoelectrons is 2 eV. When photons of…2016
- If c is the velocity of light in free space, the correct statements about photon among the following are: A. The energy of a photon is E=h v. B. The…2024
- An electron is accelerated from rest through a potential difference of V volt. If the de Broglie wavelength of the electron is 1.227 × 10^-2 nm, the…2020
- A photon and an electron (mass m ) have the same energy E. The ratio ( λ_photon / λ_electron ) of their de Broglie wavelengths is: ( c is the speed…2025
- When the energy of the incident radiation is increased by 20\%, the kinetic energy of the photoelectrons emitted from a metal surface increased from…2014
- For photoelectric emission from certain metal the cutoff frequency is ν. If radiation of frequency 2 ν impinges on the metal plate, the maximum…2013
- The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600 nm, when it delivers the power of 3.3 ×…2021
- An electron is accelerated through a potential difference of 10,000 V. Its de Broglie wavelength is, (nearly): (m_e=9 × 10^-31 kg)2019
NEET (UG) 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.