answers
1
λ = [tex]1.5*10^{-2}[/tex] meters
2
λ = [tex]1.2*10^{-1}[/tex] meters
3
f = [tex]8.0*10^{1}[/tex] Hz
explanation
the equation c = λf can be used
c is the speed of light = [tex]3*10^8[/tex]
λ is the wavelength
f is the frequency
1
c = λf
[tex]3*10^8=2.0*10^6[/tex]λ
λ = [tex]\frac{3*10^8}{2.0*10^6}[/tex]
λ = [tex]1.5*10^{-2}[/tex] meters
2
c = λf
[tex]3*10^8=2.5*10^7[/tex]λ
λ = [tex]\frac{3*10^8}{2.5*10^7}[/tex]
λ = [tex]1.2*10^{-1}[/tex] meters
3
c = λf
[tex]3*10^8=3.75*10^6[/tex]f
f = [tex]\frac{3*10^8}{3.75*10^6}[/tex]
f = [tex]8.0*10^{1}[/tex] Hz
