1) Light travel from high density medium to low density medium  a) Critical Angle b) Refractive Index c) Total Internal Reflection d) Reflection 2) Refractive index, n = a) 1/sin c b) 1/2sin c c) 1/cos c d) sin c / cos c 3) Natural phenomena involve TIR a) Flood b) Rainbow c) Aurora d) Snow 4) Application of TIR in daily life a) Mirror b) Magnifying Glass c) Concave Lens d) Prism Periscope 5) Angle of Incident rays for Total Internal Reflection to oocurs a) i<c b) i=c c) i>c

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