Figure shows a ray of light passing through a prism. If the refracted ray QR is parallel to the base BC, show that (i) `r_1= r_2 = A/2` and (ii) Angle of minimum decoration, `D_m = 2i

Figure shows a ray of light passing through a prism. If the refracted ray QR is parallel to the base BC, show that
(i) `r_1= r_2 = A/2` and
(ii) Angle of minimum decoration, `D_m = 2i — A`

Figure shows a ray of light passing through a prism. If the refracted ray QR is parallel to the base BC, show that (i) `r_1= r_2 = A/2` and (ii) Angle of minimum decoration, `D_m = 2i —

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Figure shows a ray of light passing through a prism. If the refracted ray QR is parallel to the base BC, show that (i) `r_1= r_2 = A/2` and (ii) Angle of minimum decoration, `D_m = 2i —

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