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Optical lenses (physics): definition, description, formula and solution
Optical lenses (physics): definition, description, formula and solution

There are objects that are capable of changing the density of the electromagnetic radiation flux falling on them, that is, either increasing it by collecting it at one point, or decreasing it by scattering it. These objects are called lenses in physics. Let's take a closer look at this question

  • Inconsistent definitions: examples. Agreed and inconsistent definition
    Inconsistent definitions: examples. Agreed and inconsistent definition

    In the article you can find the most complete information about inconsistent definitions: how they can be expressed, what words they refer to, what questions they answer, what matters, how they differ from additions, when they are isolated and when they are not isolated. It also contains many examples of sentences with inconsistent definitions. The last chapter gives examples of the task of the OGE in the Russian language, knowledge of inconsistent definitions is required to complete this task

  • Participle Endings: Spelling
    Participle Endings: Spelling

    This article deals with the spelling of vowels in participle endings. Along with this, you can repeat the spelling of agreed parts of speech and personal endings of verbs. In the article you can find many practical tasks on the formation of the skill of spelling the endings of participles: to find the main word, to correctly pose the question to the participle from the main word, focusing on the question, to choose the right case form of the participle

  • Riddles with pronouns. Riddles with answers
    Riddles with pronouns. Riddles with answers

    In this article you can find many riddles with pronouns. Each riddle has an answer. Also here you can find recommendations on the use of riddles in a lesson with a child

  • Introductory construction: examples. Sentences with introductory constructions
    Introductory construction: examples. Sentences with introductory constructions

    In this article you can find the most complete information about introductory constructions: what is an introductory construction, how does it differ from sentence members, how to distinguish between introductory constructions and sentence members, how to distinguish between introductory constructions and plug-in constructions. In addition, there are many examples of introductory words and constructions, sentences with introductory words and introductory constructions

Interesting articles

Astronomical clock. What is the astronomical hour?
Astronomical clock. What is the astronomical hour?

With the increasing complexity of human activity, methods of measuring time also improved. Each interval began to acquire more and more precise meaning. An atomic and ephemeral second, an astronomical hour arose (“How much is this?” You ask. The answer is a little lower). Today, the focus of our attention is the hour, the most commonly used unit of time in everyday life, as well as the clock, without which it is difficult to imagine the modern world

  • Maria Osipova is a famous anti-fascist underground fighter
    Maria Osipova is a famous anti-fascist underground fighter

    Maria Borisovna Osipova is a well-known underground anti-fascist. Conducted its activities in Minsk. During the occupation, she organized the first underground group there. She helped develop the plan and participated in the liquidation of Wilhelm Kube (the High Commissioner of Belarus). In 1943 she became a Hero of the Soviet Union. In this article we will describe her brief biography

  • The meaning of the word "option": noun synonyms, sentences and interpretation
    The meaning of the word "option": noun synonyms, sentences and interpretation

    What unites all people in the world? It's hard to understand right away, isn't it? Probably, they are united by love for variants and synonyms of the last noun. Because everyone would like more choices, and this is an option. Consider the variety of life scenarios, but we will focus, of course, on the changing noun - "option"

  • Great travelers and their discoveries
    Great travelers and their discoveries

    Whoever reads about the brave wanderers of the Middle Ages, who tried to open more profitable trade routes or perpetuate their name, is delighted to imagine how it happened. What is most surprising is how great travelers could survive their adventures in reality, showing so much perseverance and resourcefulness

  • Mesopotamia: architecture of ancient civilization
    Mesopotamia: architecture of ancient civilization

    The state and culture of Mesopotamia, formed in the basins of the Tigris and Euphrates rivers, formed the first significant civilization in the history of mankind. And it is the remains of ancient buildings that provide the most complete information about these long-vanished states

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Ludwig II of Bavaria: biography and photos
Ludwig II of Bavaria: biography and photos

King Ludwig II of Bavaria was one of the most controversial German monarchs. He had little interest in state affairs, but devoted all his time to patronizing the arts and building castles. The monarch was declared mentally ill and died under mysterious circumstances

  • What is the ethics of science?

    In all areas of human activity, there are certain moral standards. Science is no exception. Scientists are obliged to obey the system of moral norms, universal moral requirements and prohibitions: do not steal, do not lie, and a number of other well-known principles

  • Research methods in term paper: examples

    The modern system for assessing the knowledge gained by students includes work on a course project and the design of a finished work. Thus, in addition to testing knowledge, it is possible to assess the ability of students to consistently express their thoughts and logically achieve their goals. The course work contains standard sections, including: determination of relevance, setting goals, tasks of work and determination of research methods

  • Valence of iron. What is the valency of iron?

    It is difficult to overestimate the role of iron for the human body, because it contributes to the "creation" of blood, its content affects the level of hemoglobin and myoglobin, iron normalizes the functioning of the enzyme system. But what is this element in terms of chemistry? What is the valency of iron? This will be discussed in this article

  • The spine is Definition, human anatomy. The structure of the spine, the relationship with organs and muscles, the definition of changes and treatment

    The spine is the main axis to which almost all internal organs in the human body are attached. Its constituent parts are the vertebrae, the structure and functions of which are different in each department. The total number of human vertebrae reaches thirty-four

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