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Q: Travelers in deserts often tend to have an optical illusion of a sheet of water where none actually exists. What is this called ?
  • A. Mirage
  • B. Reflection
  • C. Diversion
  • D. Scattering
Correct Answer: Option A - Travelers in deserts often tend to have an optical illusion of a sheet of water where none actually exists. It is a called mirage. Mirage – Mirage happens when the ground is very hot and the air is cool. The hot ground warms the layer of air just above the ground. When the light travels through the cold air and enter into the layer of hot air it is refracted. A layer of very warm air, near the ground refracts the light and thus mirage occurs.
A. Travelers in deserts often tend to have an optical illusion of a sheet of water where none actually exists. It is a called mirage. Mirage – Mirage happens when the ground is very hot and the air is cool. The hot ground warms the layer of air just above the ground. When the light travels through the cold air and enter into the layer of hot air it is refracted. A layer of very warm air, near the ground refracts the light and thus mirage occurs.

Explanations:

Travelers in deserts often tend to have an optical illusion of a sheet of water where none actually exists. It is a called mirage. Mirage – Mirage happens when the ground is very hot and the air is cool. The hot ground warms the layer of air just above the ground. When the light travels through the cold air and enter into the layer of hot air it is refracted. A layer of very warm air, near the ground refracts the light and thus mirage occurs.