Positive

Positive is a property of positivity and may refer to:

Mathematics and science

  • Converging lens or positive lens, in optics
  • Plus sign, the sign "+" used to indicate a positive number
  • Positive (electricity), a polarity of electrical charge
  • Positive element of a C*-algebra (such as a bounded linear operator) whose spectrum consists of positive real numbers
  • Positive formula, a logical formula not containing negation
  • Positive number, a number that is greater than 0
  • Positive (photography), a positive image, in which the color and luminance correlates directly with that in the depicted scene
  • Positive result, a result that has been found significant in statistical hypothesis testing
  • Positive sense, said of an RNA sequence that codes for a protein
  • Positive test, a diagnostic test result that indicates some parameter being evaluated was present
  • Philosophy and humanities

  • Affirmative (linguistics), a property of a non-negated expression (the opposite of negative)
  • Affirmative (policy debate), the team which affirms the resolution
  • Positive (photography)

    A positive is a film or paper record of a scene that represents the color and luminance of objects in that scene with the same colors and luminances (as near as the medium will allow). Color transparencies are an example of positive photography: the range of colors presented in the medium is limited by the tonal range of the original image (dark and light areas correspond). It is opposed to a negative where colors and luminances are reversed: this is due to the chemical or electrical processes involved in recording the scene. Positives can be turned into negatives by appropriate chemical or electronic processes. Often, with the use of digital imaging, computers can automatically complete this process.


    image area : light transfer from image area & non image area are opaque .<positive> -ve making : image area are opaque and non image transparent .<negative>


    Positivism

    Positivism is a philosophical theory stating that positive knowledge is based on natural phenomena and their properties and relations. Thus, information derived from sensory experience, interpreted through reason and logic, forms the exclusive source of all authoritative knowledge. Positivism holds that valid knowledge (certitude or truth) is found only in this derived knowledge.

    Verified data (positive facts) received from the senses are known as empirical evidence; thus positivism is based on empiricism.

    Positivism also holds that society, like the physical world, operates according to general laws. Introspective and intuitive knowledge is rejected, as is metaphysics and theology. Although the positivist approach has been a recurrent theme in the history of western thought, the modern sense of the approach was formulated by the philosopher Auguste Comte in the early 19th century. Comte argued that, much as the physical world operates according to gravity and other absolute laws, so does society, and further developed positivism into a Religion of Humanity.

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