When the light is moving from rare medium to denser medium on reflection it suffers a phase change of:
Correct answer: A. 180°
- A. 180°
- B. 120°
- C. 90°
- D. 0°
Explanation
When a light wave passes from a rarer medium to a denser medium, there will be a phase change of 180°.
This question appeared on the ETEA MDCAT 2011 paper, which you can sit online with every answer explained.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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