Answer:
The answer is 535 nanometers.
Explanation:
[tex]1\ micrometer = 1\ \mu m = 1.0\times 10^{-6}\ m.[/tex]
and
[tex]1\ nanometer = 1\ nm = 1.0\times 10^{-9}\ m.[/tex],
so
[tex]1\ \mu m = 1.0 \times 10^{3}\ nm[/tex]
which means that
[tex]\lambda = 0.535\ \mu m = 535\ nm[/tex].
In fact we can say that the light is green, because its wavelength is in the range of 500 nm to 565 nm.