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
Definition - What does Refractometer mean? A refractometer is commonly used to test the brix level (sugar content) in ripening vegetables and fruits, or to indicate whether some elements or nutrients are missing from the plants. Most plants with a low brix reading indicate that not enough nutrients are being absorbed by the roots.