Đáp án:
2.\({6.10^{ - 6}}\left( m \right)\)
3. 5mm
Giải thích các bước giải:
\(\begin{array}{l}
2.\\
{x_{s10}} = 10i\\
\Rightarrow 4 = 10i\\
\Rightarrow i = 0,4\left( {mm} \right) = {4.10^{ - 4}}\left( m \right)\\
i = \frac{{D\lambda }}{a}\\
\Rightarrow {4.10^{ - 4}} = \frac{{1.\lambda }}{{{{2.10}^{ - 3}}}} \Rightarrow \lambda = {6.10^{ - 6}}\left( m \right)\\
3.\\
\left\{ \begin{array}{l}
{x_{s2}} = 2i\\
{x_{s5}} = 5i
\end{array} \right.\\
{x_{s5}} - {x_{s2}} = 3\left( {mm} \right)\\
\Rightarrow 3i = 3\\
\Rightarrow i = 1\left( {mm} \right)\\
\left\{ \begin{array}{l}
{x_{s3}} = 3i\\
{x_{s8}} = 8i
\end{array} \right.\\
{x_{s8}} - {x_{s3}} = 5i = 5\left( {mm} \right)
\end{array}\)
