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8. A light ray strikes a flat piece of glass at an angle of incidence 30. The index of refraction of the glass is 1.5. The th

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30 2 см C Sin 30 Sing 15 0.39cm Sing= Sin 30 1.5 .روو 2x1.5 8- Sin (173) 8 = 19.47 degree = 19.5° 8 al 19.50 d- 2cm sin (30-

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