os. When light enters glass (or any other medium) it suffers a change in:
(aWavelength only
(b)Frequency only
c) Velocity only
d)Both velocity and wave length
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Refraction is an effect that occurs when a light wave, incident at an angle away from the normal, passes a boundary from onemedium into another in which there is achange in velocity of the light. Light is refracted when it crosses the interface from air into glass in which it moves more slowly.
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