Enemy or foe is an individual or a group that is seen as forcefully adverse or threatening. The concept of an enemy has been observed to be basic for both individuals and communities.
A diffractometer (pronunciation: di-frak-'tÃ¤-m&-t&r) is a measuring instrument for analyzing the structure of a material from the scattering pattern produced when a beam of radiation or particles (such as X-rays or neutrons) interacts with it. Principle
Terms. 1  spectrophotometry A spectrophotometer is commonly used for the measurement of transmittance or reflectance of solutions. 2  gravimeter An instrument used to measure local variations in the gravitational field. 3  flow cytometry A technique used to sort and classify cells by using fluorescent markers on their surface.