A) \[3\times {{10}^{23}}\]
B) \[2.5\times {{10}^{22}}\]
C) \[2.5\times {{10}^{20}}\]
D) \[5\times {{10}^{17}}\]
Correct Answer: C
Solution :
\[P=\frac{nhc}{\lambda t}\Rightarrow \frac{n}{t}=\frac{P.\lambda }{hc}=\frac{100\times 5000\times {{10}^{-10}}}{6.6\times {{10}^{-34}}\times 3\times {{10}^{8}}}\] \[=2.50\times {{10}^{20}}\]
You need to login to perform this action.
You will be redirected in
3 sec
