কোনো মাধ্যমের প্রতিসরাঙ্ক 1 এর কম হতে পারে না কেন?
Answers
Laws of refraction: The laws of refraction should be illustrated with the help of clear line diagrams. Snell's law. It should be mentioned that for normal incidence, μ=sinisinr does not hold. Angular deviation of light ray during refraction.
Familiarity with structured of a lass slab and a prism.
Photograph of a glass slab, discussion of its geometrical shape, refracting surface of the slab. Photograph of a prism. Discussion regarding structure of prism, characteristics of different plains of prism, principal section of a prism, angle of the prism, base of a prism.
Refraction through a glass slab and a prism. Deviation of light ray due to refraction.
Glass slab: Incident ray and emergent ray parallel (only ray diagram using Snell's law, no mathematical deduction.)
Prism: Angle of deviation between incident and emergent ray. Derivation of δ=i1+i2−A using simple geometry (Derivation of the expression for minimum deviation is not necessary).
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