What do radio waves and microwaves have in common? Both are found next to visible light on the electromagnetic spectrum.

Both are at the side of the spectrum that has the highest radiant energy.

Both are at the side of the spectrum that has the lowest frequency.

Both are at the side of the spectrum that has the shortest wavelengths.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later