# 404 - GUIDE QUESTIONS 1 If the transparent material has an...

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GUIDE QUESTIONS 1. If the transparent material has an index of refraction of 1.2, what is the angle of incidence beyond which total internal reflection occurs? 2. Is it possible for the critical angle to exist when light goes from water (n = 1.33) into glass (n = 1.5)? Explain your answer? Total internal refraction will not happen to a light passing through water and glass, TIR will only happen if the light passes though a less denser medium to a denser medium. PROBLEMS 1. Light traveling in a medium with a speed of 1.5x10 8 m/sec, strikes the surface of a transparent material where it travels at a speed of 2x10 8 m/sec. if the incident angle is 36.86°, find the angle of refraction and the critical angle between two media. 2. A ray of light from air, incident at an angle of 60° on top of a transparent surface, is refracted and reflected partly. It is observed that the refracted and reflected rays are perpendicular to each other. Find the index of refraction and velocity of light in the transparent surface. 3. Light strikes the surface of a transparent material at an angle of incidence of 30°. If the refracted angle in the transparent material is 20°, what is the speed of light in the material? EXPERIMENT 404: INDEX OF REFRACTION

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Name Pallera, Alexis Romeo C . Group No. 03 Program/Year CE- 2 Seat No. 303 Subject/Section PHY104L/B1 Date 11/08/0 8 DATA and OBSERVATIONS PART A and B. DETERMINATION OF INDEX OF REFRACTION PART A Light bends from GLASS to AIR PART B Light bends from AIR to GLASS Length of line GH 4.2 cm 4.8 cm Length of FL 6.1 cm 3.1 cm Index of refraction of air, n a 1.0 1.0
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• Fall '13
• Angle of Incidence, Snell's Law, Total internal reflection, Alexis Romeo C

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