What are the meaning of all of them PLS HELP periscope

tempo

microscope

popular

Pericope: an apparatus consisting of a tube attached to a set of mirrors or prisms, by which an observer (typically in a submerged submarine or behind a high obstacle) can see things that are otherwise out of sight.

Tempo: the speed at which a passage of music is or should be played.

Microscope: an optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells, typically magnified several hundred times.

Popullar: liked, admired, or enjoyed by many people or by a particular person or group.

Explanation:

i have no explanation