Gujarati
11.Dual Nature of Radiation and matter
medium

यदि $6000 \mathring A$ तरंगदैध्र्य के संगत फोटॉन की ऊर्जा  $3.32 \times {10^{ - 19}}J$ है, तो $4000 \mathring A$ तरंगदैध्र्य के संगत फोटॉन की ऊर्जा .......... $eV$ होगी

A$1.4 $
B$4.9 $
C$3.1 $
D$1.6 $

Solution

$E = \frac{{hc\,}}{\lambda }\, $
$\Rightarrow \,\frac{{{E_1}}}{{{E_2}}} = \frac{{{\lambda _1}}}{{{\lambda _2}}}\,$ 
$\Rightarrow \,\frac{{3.32 \times {{10}^{ – 19}}}}{{{E_2}}} = \frac{{4000}}{{6000}}$
$ \Rightarrow \,\,{E_2} = 4.98 \times {10^{ – 19}}J = 3.1\,eV$
Standard 12
Physics

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