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As you may have learned when studying the properties of thermal energy, building contractors often install double-glazed wind

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Using Snells law At interface1, (1)sin(90-40 (1.54)sin 6a sin()sin(9o-40) 1)sin (90° - 40 1.54 29 At interface2, nejaz sin 6

The angle is, e 900 -50 =40 From the triangle ABC Ax sin θ - AB From the figure, AB = PB-(x+y+ z) Calculate the PB as follows

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