Thermometer

Thermometer

A thermometer is a device used to measure temperature. There are several types of thermometers, depending on how the temperature is measured. Thermal Expansion: Uses the principle that the volume expands with increasing temperature. Mercury thermometer, … more

Diagonals of Polygons

Diagonals of Polygons

Diagonals of Polygons Diagonals are lines that connect the vertices of a polygon. However, segments that connect adjacent vertices are not called diagonal. A triangle has no diagonal because all vertices are adjacent to each other. … more

현미경

Microscope

Microscope The microscope consists of an objective lens and an eyepiece. The objective lens has a short focal length. The light reflected or transmitted by the object is gathered between the objective lens and the eyepiece. … more