Sure it is. Observing an effect caused by an object is observing it.<quoted text>
That is not "observing" it.
When you look at a flower you are observing the selected frequency reflection and scattering by the surface of the flower. The plant itself is not emitting light. When someone slaps you you observe it through various pain signals sent to your brain. There are many ways that observations can be made. Your personal prejudices do not apply.