What is the angle of refraction of ray of light incident normally to the surface ?
(A) 90° (B) 60° (C) 30° (D) 0
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ABX THR- 28 C 10- 30 BF3-14PI GXN SPC THR- 60 C 60 TOF -D 90 $ 6.XN SPC THR- 85C 85 CCH - D 135 NEUT POLARIZATION G , XN NOX THR- 48 C 48 ACT - I 4PI GXN SPC 11- 85C 85 CCH - 0 135 GXN ABX 10- 30C 10-30 BF 3-14PI 450 6.XN АВХ 10- 22C 10- 22 BF 3-14PI 247+ GP RLY 7- 30 C 30 EMU - D 90 ...
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