The metal wire in an incandescent lightbulb glows when the light is switched on and stops glowing when it is switched off. which kind of a change is seen in this process? .
a physical change.
a chemical change .
a nuclear change .
an ionic change.

Ionic change’ is the closest answer - electric currents are conducted by ions in some substances, though not metal. The filament - metal wire - in an incandescent lightbulb glows with visible light because it is heated to a very high temperature by an electric current being passed through it. It is not a physical change because this generally involves change from one state to another — for example, solid to liquid. Chemical changes usually result from chemical reactions.

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

Noble gases is far right