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UPCAT Science practice question 37: A straw appears bent where it enters a glass of water. This is caused by

Correct answer

A. refraction

Light changes speed and bends as it crosses between media of different optical density, which shifts the apparent position of the submerged part.

A straw appears bent where it enters a glass of water. This is caused by

  1. refractionCorrect
  2. reflection
  3. diffraction
  4. polarization

Why A is correct

Light changes speed and bends as it crosses between media of different optical density, which shifts the apparent position of the submerged part.

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