To explain: if a light wave travelling in water reaches water surface then under what circumstances will total internal reflection occur.
Explanation of Solution
Introduction:
Total internal reflection occurs if the light travels from a denser medium to a rarer medium. Again for total internal reflection to occur the angle of incidence should be greater than the critical angle.
When a light wave travels through water and reaches the water surface then it enters from denser medium water to a less dense medium air. At this point, the light wave gets reflected as the angle of incidence is more than the critical angle. The light wave strikes the surface of water whose refractive index is low and the light gets totally reflected.
Conclusion:
Thus, total internal reflections occur when light in water reaches the water surface.
Chapter 12 Solutions
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
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