Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • In a special experiment angular momentum is an even integral multiple of The longest

In a special experiment angular momentum is an even integral multiple of \mathrm{h/2\pi. }The longest possible wavelength emitted by hydrogen in visible region in the experiment according to Bohr’s model will be
 

Option: 1

\mathrm{478\: nm}


Option: 2

\mathrm{322\: nm}


Option: 3

\mathrm{33\: nm}


Option: 4

\mathrm{50\: nm}


Answers (1)

best_answer

\mathrm{m v r=\frac{2 n h}{2 \pi}}
\mathrm{\therefore \text{In 2nd state KE becomes} \frac{1}{4} \text{th of the initial} \: KE, i.e. 3.4 \mathrm{eV}\: in\: \: n=1.}

\mathrm{3.4 \mathrm{eV}\: in \: n=1.}

Binding energy \mathrm{=-27.2+3.4=23.8 \mathrm{eV}}

\mathrm{ E_1=23.8 \mathrm{eV}, E_2=\frac{23.8}{2^2}=5.95 \mathrm{eV} }

\mathrm{ E_3=2.64 \mathrm{eV}\left(=\frac{23.8}{3^2}\right) }

Maximum visible light energy is \mathrm{2.64 \mathrm{eV}.}

\mathrm{ \lambda=\frac{1242}{2.64}=478 \mathrm{~nm} }

Hence option 1 is correct.
 

Posted by

Riya

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

NTA opens NEET UG 2026 re-exam correction window to modify address, select choice of cities
anam-khan

CBI arrests NEET paper leak 'kingpin' in Pune; chemistry prof shared questions in coaching classes
anam-khan

NEET aspirant dies by suicide in Delhi; family takes body for cremation without informing police

Latest Question