Welcome to the Quiz!
This quiz contains 12 questions from a mix of 1 subtopics.
What is the angle called at which a wave strikes a surface?
angle of reflection
angle of incidence
angle of refraction
angle of diffraction
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Which of the following statements is true about reflection?
the angle of incidence is always greater than the angle of reflection
the angle of reflection depends on the type of wave
the angle of reflection is unrelated to the angle of incidence
the angle of incidence equals the angle of reflection
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If a wave slows down when entering a new medium, which way does it refract?
perpendicular to the normal line
away from the normal line
parallel to the normal line
towards the normal line
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What happens to the frequency of a wave when it refracts?
it decreases
it remains constant
it becomes 0
it increases
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In total internal reflection, why does light reflect back into the original medium?
the refractive index suddenly changes
the angle of incidence is greater than the critical angle
the angle of incidence equals the critical angle
the angle of incidence is less than the critical angle
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What happens to the critical angle for total internal reflection as the refractive index increases?
it remains constant
it decreases
it approaches 90 degrees
it increases
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What is the ratio of the speed of light in a vacuum to the phase velocity in a material called?
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What occurs when waves change direction due to entering a new medium?
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Give 2 reasons why wave speed changes and direction changes when waves refract.
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A ray of light enters a glass block from air, striking the surface at an angle of 45°. If the refractive index of glass is 1.5, what is the angle of refraction inside the glass block?
28.1°
29.8°
34.5°
32.2°
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What is the critical angle for total internal reflection to occur at the interface between diamond (n=2.42) and air?
28.3°
24.4°
48.5°
41.1°
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Using Snell's law, calculate the angle of incidence when a light ray passes from a medium with refractive index 1.77 into air, resulting in an angle of refraction of 60°.
35.2°
29.3°
40.1°
37.4°
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