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2. Angle of incidence (optics) - Wikipedia

   en.wikipedia.org/wiki/Angle_of_incidence_(optics)

   The angle of incidence, in geometric optics, is the angle between a ray incident on a surface and the line perpendicular (at 90 degree angle) to the surface at the point of incidence, called the normal. The ray can be formed by any waves, such as optical, acoustic, microwave, and X-ray. In the figure below, the line representing a ray makes an ...

3. Ten percent of the brain myth - Wikipedia

   en.wikipedia.org/wiki/Ten_percent_of_the_brain_myth

   The 10% of the brain myth states that humans generally use only one-tenth (or some other small fraction) of their brains. It has been misattributed to many famous scientists and historical figures, notably Albert Einstein. [1] By extrapolation, it is suggested that a person may 'harness' or 'unlock' this unused potential and increase their ...

4. Gray DiLoreto The Effects of Student Engagement Student ...

   files.eric.ed.gov/fulltext/EJ1103654.pdf

   online courses seem to have a reciprocal relationship in which one influences the progress of the other and vice-versa (Shea et al., 2006). “When optimized, technological tools can help instructors to establish a knowledgeable and approachable presence, a vital element of strong online courses” (Jaggars et al., 2013, p. 3).

5. Oxytocin - Wikipedia

   en.wikipedia.org/wiki/Oxytocin

   Oxytocin is a peptide hormone and neuropeptide normally produced in the hypothalamus and released by the posterior pituitary. Present in animals since early stages of evolution, in humans it plays roles in behavior that include social bonding, love, reproduction, childbirth, and the period after childbirth.