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MCAT Physics Question — Pool

Narcissus gazes down into a pool of water and sees his face. This is a result of


a) refraction


b) dispersion


c) diffraction


d) reflection




Seeing an image at the interface between two mediums is a result of reflection.


a) refraction, incorrect, Refraction is the bending of a wave when entering a medium in which its speed is different.


b) dispersion, incorrect, Dispersion refers to a medium in which the velocity of light depends on its frequency. One common example is a dispersive prism which splits multi-hued light into a rainbow due to differences in refraction as the light passes through the prism geometry.


c) diffraction, incorrect, Diffraction refers to the effects of a wave encountering a slit.


d) reflection, correct, The water surface functions as a plane mirror.


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