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Related Experiment Video

Updated: Apr 3, 2026

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

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Published on: February 12, 2014

Mirage is an image in a flat ground surface.

M Taghi Tavassoly, Soghra Osanloo, Ali Salehpour

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|September 15, 2015

Summary

This study challenges the common explanation for mirages, demonstrating that temperature gradients do not cause these optical illusions. New experiments reveal mirages are related to light

Area of Science:

Optics and atmospheric physics
Wave nature of light
Optical phenomena

Background:

Mirages are optical phenomena with debated formation mechanisms.
Existing theories often rely on qualitative descriptions and unverified assumptions about temperature gradients.
Two main explanations involve total internal reflection and image formation on rough surfaces.

Purpose of the Study:

To investigate the physical principles underlying mirage formation.
To experimentally validate or refute the role of temperature gradients in creating mirages.
To explore the connection between Fermat's principle, wave optics, and image formation.

Main Methods:

Theoretical analysis incorporating Fermat's principle and wave interference.

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Experimental investigations conducted in laboratory settings and natural desert environments.

Comparison of experimental results with established theories of image formation.

Main Results:

Fermat's principle inherently includes wave phenomena like interference, crucial for image formation.
Experimental evidence indicates that temperature gradients near the ground are not the cause of mirages.
The study supports the theory of mirage formation as an image on a rough surface observed at grazing angles.

Conclusions:

The widely accepted explanation of mirages due to ground-level temperature gradients is experimentally refuted.
Mirage formation is better understood through the principles of wave optics and image formation on rough surfaces.
This research provides a more accurate, experimentally validated model for understanding mirages.