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  2. Depth perception - Wikipedia

    en.wikipedia.org/wiki/Depth_perception

    Perspective, relative size, occultation and texture gradients all contribute to the three-dimensional appearance of this photo. Depth perception is the ability to perceive distance to objects in the world using the visual system and visual perception. It is a major factor in perceiving the world in three dimensions

  3. Size consistency and size extensivity - Wikipedia

    en.wikipedia.org/wiki/Size_consistency_and_size...

    In quantum chemistry, size consistency and size extensivity are concepts relating to how the behaviour of quantum-chemistry calculations changes with the system size. Size consistency (or strict separability) is a property that guarantees the consistency of the energy behaviour when interaction between the involved molecular subsystems is nullified (for example, by distance).

  4. Subjective constancy - Wikipedia

    en.wikipedia.org/wiki/Subjective_constancy

    Subjective constancy or perceptual constancy is the perception of an object or quality as constant even though our sensation of the object changes. [1] While the physical characteristics of an object may not change, in an attempt to deal with the external world, the human perceptual system has mechanisms that adjust to the stimulus.

  5. Perceived visual angle - Wikipedia

    en.wikipedia.org/wiki/Perceived_visual_angle

    Angular size illusions are most obvious as relative angular size illusions, in which two objects that subtend the same visual angle appear to have different angular sizes; it is as if their equal-sized images on the retina were of different sizes. Angular size illusions are contrasted with linear size illusions, in which two objects that are ...

  6. Moon illusion - Wikipedia

    en.wikipedia.org/wiki/Moon_illusion

    Photographs of the Moon at different elevations also show that its size remains the same. A simple way of demonstrating that the effect is an illusion is to hold a small pebble (say, 0.33 inches or 8.4 millimetres wide) at arm's length (25 inches or 64 centimetres) with one eye closed, positioning the pebble so that it covers (eclipses) the ...

  7. Size constancy - Wikipedia

    en.wikipedia.org/?title=Size_constancy&redirect=no

    This page was last edited on 14 December 2012, at 05:02 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  8. Consistency (statistics) - Wikipedia

    en.wikipedia.org/wiki/Consistency_(statistics)

    For example, records for rainfall within an area might increase in three ways: records for additional time periods; records for additional sites with a fixed area; records for extra sites obtained by extending the size of the area. In such cases, the property of consistency may be limited to one or more of the possible ways a sample size can grow.

  9. Inertial frame of reference - Wikipedia

    en.wikipedia.org/wiki/Inertial_frame_of_reference

    Newton posited an absolute space considered well-approximated by a frame of reference stationary relative to the fixed stars. An inertial frame was then one in uniform translation relative to absolute space. However, some "relativists", [10] even at the time of Newton, felt that absolute space was a defect of the formulation, and should be ...