CREATOR bRHmH HAS INSTALLED A COMPASS FOR DIRECTION IN EACH CREATION.....
Posted by Vishva News Reporter on February 24, 2003

PEOPLE CAN see the Earth's magnetic field, albeit unconsciously. The effect is too small to be noticeable, but other animals may use their eyes in this way to get their bearings, says a report in New Scientist..

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Compass in your eye

 



Birds and some other migrating animals seem to use angles to help them navigate.

PEOPLE CAN see the Earth's magnetic field, albeit unconsciously. The effect is too small to be noticeable, but other animals may use their eyes in this way to get their bearings, says a report in New Scientist.

The Earth's magnetic field lines vary depending where you are. They always run south to north, but are horizontal only at the equator, dipping in at a steeper angle the greater the latitude.

Birds and some other migrating animals seem to use these angles to help them navigate, and one theory is that they do so using light-sensitive cells.

German researchers investigated whether people's eyes are sensitive to these field lines.

They measured the lowest level of light that people could detect in a small spot straight ahead of them. They had people face south, west and south south-west, and used a magnetic coil to create a horizontal north-facing field.

They then repeated the experiment with the Earth's natural magnetic field, which in Germany is angled 70 degrees downwards towards the north.

When the field lines coincided with the direction of the spot, which only occurred when people faced south in a horizontal field, the threshold of brightness at which their eyes first detected a very dim light went up.

The effect was small but significant, say the researchers. Although we are not conscious of it, the same probably happens when photoreceptors in the eye are aligned with the Earth's magnetic field.

American researchers studying newts say the light compass in them probably use specialized photoreceptors to detect the magnetic field lines.

Magnetic fields interact with spinning electrons, and could theoretically influence photoreceptor chemicals at the quantum level, altering their efficiency.

 

 

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