[tex] \bf \dag \boxed{ \lambda \{ \rm wavelength \} = \dfrac{speed}{frequency} }[/tex]
So:-
[tex] \dashrightarrow\lambda \{ \rm wavelength \} = \dfrac{150 \cancel0}{1 \cancel0} \\ [/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow\lambda \{ \bf wavelength \} =150m[/tex]
