Translucent.
It cannot be seen with visible light. but it is believed to be spherical.
When a substance absorbs light the wavelengths that correspond to that color cannot be seen. Only colors that are reflected are visible.
A mirage or hallucination, maybe?
light is a form of energy and energy cannot be destroyed or created only changed so the amount of possible light is equal to the amount of energy in the universe
it is a light that cannot be seen.
It depend on what you think. I think emotions and light can be seen and not be seen.
None.
Light Energy
NO, to see something you have to be able to intercept light reflected from that thing's surface. Black holes have an escape velocity greater than the sped of light so there is no reflected light and they cannot be seen. If they cannot be seen they cannot be pretty ... or ugly.
No light is not in a liquid form and therefore cannot evaporate
A colloid.
Translucent.
Oxygen in its pure, gasseous form, as usually encountered on Earth is an invisible gas and cannot be seen.
translucent
It cannot be seen with visible light. but it is believed to be spherical.
That is when the DNA is condensed, at which time it is called chromosome.