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Given figure shows a 90° sector of spherical reflector with vertex 'V', centre of curvature 'C' and equal distances VD, DF, FE and EC. When a beam of EM wave is incident parallel to the axis, all the energy will pass through the reg | |
A. | VD [Wrong Answer] |
B. | DF [Wrong Answer] |
C. | EF [Wrong Answer] |
D. | EC [Correct Answer] |