Assertion $:-$ Emitted radiation will fall in the visible region when an electron jumps from $n=4$ to $n=2$ in a hydrogen atom.
Reason $:-$ The frequency of radiation of the Lyman series belongs to the visible region for a hydrogen atom.
Reason $:-$ The frequency of radiation of the Lyman series belongs to the visible region for a hydrogen atom.
- ABoth Assertion $\&$ Reason are True $\&$ the Reason is a correct explanation of the Assertion.
- BBoth Assertion $\&$ Reason are True but Reason is not a correct explanation of the Assertion.
- CAssertion is True but Reason is False.
- DBoth Assertion $\&$ Reason are False.
Explore More
Similar Questions
What is the work function of the metal if the light of wavelength $4000 \, \mathring{A}$ generates photoelectrons of velocity $6 \times 10^5 \, ms^{-1}$ from it? ............. $eV$ (Mass of electron $= 9 \times 10^{-31} \, kg$; Velocity of light $= 3 \times 10^8 \, ms^{-1}$; Planck's constant $= 6.626 \times 10^{-34} \, Js$; Charge of electron $= 1.6 \times 10^{-19} \, C \, eV^{-1}$)
DifficultJEE MAIN 2019
View SolutionFollowing results are observed when sodium metal is irradiated with different wavelengths. Calculate $(a)$ threshold wavelength and $(b)$ Planck's constant.
$\lambda \ (nm)$ $500, 450, 400$ $v \times 10^{-5} \ (cm \ s^{-1})$ $2.55, 4.35, 5.35$
| $\lambda \ (nm)$ | $500, 450, 400$ |
| $v \times 10^{-5} \ (cm \ s^{-1})$ | $2.55, 4.35, 5.35$ |
Difficult
View SolutionWhich hydrogen-like species will have the same radius as that of the $1^{st}$ Bohr orbit of a hydrogen atom?
$A$ metal surface is illuminated by light of two different wavelengths $248 \ nm$ and $310 \ nm$. The maximum speeds of the photoelectrons corresponding to these wavelengths are $u_1$ and $u_2$ respectively. If the ratio $u_1 : u_2 = 2 : 1$ and $hc = 1240 \ eV \ nm$,the work function of the metal is nearly $:-$ (in $eV$)
Medium
View SolutionThe ionization enthalpy of a hydrogen atom is $1.312 \times 10^6 \, J \, mol^{-1}$. The energy required to excite an electron from $n = 1$ to $n = 2$ in the atom is .......
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo