The H line in Calcium is normally at 396.9 nm. However, in a star's spectrum it is measured at 398.1nm. How fast is the star moving and is it moving towards the Earth or away from the Earth

answer

procedural programming, object-oriented programming

explanation

procedural programming is a type of computer programming language that specifies a series of well structured steps and procedures   within its development period of time. it contains a systematic order of statements, functions and commands to complete a computational task or program. it is centered on creating procedures. while object oriented programming is a programming language that is centered on creating objects rather that actions and data rather than logic.. it has four principles which are inheritance, polymorphism, abstraction and encapsulation

answergravity;

b

explanation: