Question

Suppose the eyes of an alien being are sensitive to microwaves. Do you except the alien being to have larger or smaller eyes than ours?

Answer 1

The wavelength of microwave is much larger that of visible light. The microwaves can enter
the eyes and produce the sensation of sight if the size of the eyes and the ratina are comprable to the wavelength of microwaves. Therefore, the alien being sould have much larger eyes than ours.