Q:

Consider the situation where a light wave travelling in air strikes a glass surface with an angle of incidence of 20o . Which of the following statements is true?

waelhammad
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2022-10-20
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Consider the situation where a light wave travelling in air strikes a glass surface with an angle of incidence of 20o . Which of the following statements is true?

  1. The angle formed by the incident ray and the normal will be 20°.
  2. The angle of refraction will be greater than 20°.
  3. The angle formed by the incident ray and the glass surface is 20°.
  4. There will be no refracted ray. That is, total internal reflection will occur.
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waelhammad
2022-10-20
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A: The “angle of incidence” is defined as angle formed by the incident ray and a line perpendicular with the surface (i.e. the “normal”). Total internal reflection may occur when light passes from glass to air, not air to glass.

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