Chemistry · 2014
JEE Main · 11 April 2014, Shift 1 · Q31
If λ_O and λ be the threshold wavelength and wavelength of incident light, the velocity of photoelectron ejected from the metal surface is:
If $\displaystyle \lambda_{\mathrm{O}}$ and $\displaystyle \lambda$ be the threshold wavelength and wavelength of incident light, the velocity of photoelectron ejected from the metal surface is :
Official answer
(3)
$\displaystyle \sqrt{\frac{2 h \mathrm{c}}{\mathrm{~m}}\left(\frac{\lambda_{\mathrm{o}}-\lambda}{\lambda \lambda_{\mathrm{o}}}\right)}$
More from Atomic Structure
- If the Thompson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been:2021
- The energy required by electrons, present in the first Bohr orbit of hydrogen atom to be excited to second Bohr orbit is ____ J mol^-1. Given:…2026
- Ge ( Z=32 ) in its ground state electronic configuration has x completely filled orbitals with m_l=0. The value of x is \ \ \ \.2021
- The orbital having two radial as well as two angular nodes is:2021
- Based on the equation: Δ E=-2.0 × 10^-18 J(1/(n_2^2)-1/(n_1^2)) the wavelength of the light that must be absorbed to excite hydrogen electron from…2014
- The electron in the hydrogen atom undergoes transition from higher orbitals to orbital of radius 211.6 pm. This transition is associated with:2017
- The de-Broglie wavelength of a particle of mass 6.63 g moving with a velocity of 100 ms^-1 is:2014
- The energy of one mole of photons of radiation of frequency 2 × 10^12 Hz in J mol^-1 is ____. (Nearest integer) [ Given: h=6.626 × 10^-34 J s;…2023
JEE Main 2014 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.