When a beam of light falls obliquely at the interface of the two optical media, the direction of its paths changes when it enters into the other medium.This phenomenon is called refraction.
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Suggest a reason for each of the following:
i. The sky near the horizon appears to have a reddish colour at the time of sunset and sunshine.
ii. The sun is visible to us two minutes before the actual sunrise and two minutes after the sunset.Xam idea - Science
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A thick plane-convex lens made of crown glass (refractive index 1.5) has thickness of 3 cm at its centre. The radius of curvature of the spherical surface is 5 cm.
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