The Illusion of Anti-Gravity (aka a Superior Mirage)

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SUMMARY

The forum discussion centers on the optical phenomenon known as a Fata Morgana, specifically regarding a ship appearing to hover above the water in Cornwall. Participants analyze the physics behind this illusion, referencing the principles of refraction and total internal reflection. They highlight the role of temperature gradients in the atmosphere and the refractive index differences that create multiple images of objects, including upside-down reflections. The conversation concludes that the observed gap between the ship and the water may be due to the color and luminance similarities between the sea and sky, rather than a true mirage.

PREREQUISITES
  • Understanding of optical phenomena, specifically mirages and refraction.
  • Familiarity with temperature gradients and their effects on light propagation.
  • Basic knowledge of the principles of total internal reflection.
  • Awareness of the Fata Morgana phenomenon and its characteristics.
NEXT STEPS
  • Research the physics of light refraction in different mediums.
  • Explore the conditions necessary for the formation of Fata Morgana mirages.
  • Study the impact of atmospheric temperature gradients on optical illusions.
  • Investigate similar optical phenomena in other environments, such as deserts or polar regions.
USEFUL FOR

This discussion is beneficial for physicists, meteorologists, photographers, and anyone interested in optical illusions and atmospheric science.

  • #31
hutchphd said:
I think it is still puzzling why there was insufficient warning from the watch.

I think it's not that puzzling with the stars as the only source of light.
 
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  • #32
Dark adapted from parapet on a crystal clear night with low swell I would think one should be able to see an iceberg ahead using only starlight, absent these aberrations. I am interested in the opinion of the several good sailors amongst us.
 
  • #33
hutchphd said:
Isn't this the same effect that some folks think sunk HMS Titanic?

HMS is reserved for warships of the Royal Navy.

I'd need to check Titanic but it would have been SS (steamship) or RMS (Royal Mail Ship).

Regarding the photo, it looks like the British have resorted to innovative tactics to beat the post-Brexit trade tarriffs.
 
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