question_answer 116)

  Wavelengths of different radiations are given below: \[\lambda (A)=300nm,\lambda (B)=300\mu m,\lambda (C)=3nm,\] \[\lambda (D)=30\overset{\text{o}}{\mathop{\text{A}}}\,\] Arrange these radiations in the increasing order of the energies.

Answer:

   

\[\lambda (A)=300nm\]	\[\lambda (B)=300\mu m\]
\[=300\times {{10}^{-9}}m\]	\[=300kt{{10}^{-6}}m\]
\[=3\times {{10}^{-7}}m\]	\[=3\times {{10}^{-4}}m\]
\[\lambda (C)=3nm\]	\[\lambda (D)=30\overset{{}^\circ }{\mathop{\text{A}}}\,=30\times {{10}^{-10}}m\]
\[=3\times {{10}^{-9}}m\]	\[=3\times {{10}^{-9}}m\]

\[B<A<C=D\left( E=\frac{hc}{\lambda } \right)\]