Search our database of handpicked sites
Looking for a great physics site? We've tracked down the very best and checked them for accuracy. Just pick a topic, tell us your age and knowledge level and we'll do the rest.
You searched for “length”
We found 1 result on physics.org and 31 results in our database of sites
Search results on physics.org
NPL Beginners Guide to Measurement - Length
How do we know how long a metre is? An overview of how lengths are defined.
Using the vernier calipers and micrometer screw gauge
The precision of length measurements may be increased by using a device that uses a sliding vernier scale. Two such instruments that are based on a vernier scale which you will use in the laboratory ...
Coherence Length
Definition of coherence length from Eric Weissteins's World of Physics.
Focal length of diverging lens
Animation enables the object position, in front of a diverging lens, to be altered. Exercise to calculate focal length, no check on answer.
Conversions - Length
This site allows you to convert between a wide variety of length units. Enter the value to convert from in the 'From' box and select its units from the list. Then select the units to convert to from ...
Focal Length
For a thin double convex lens, all parallel rays will be focused to a point referred to as the principal focal point. The distance from the lens to that point is the principal focal length f of the ...
Lorentz Transformation
A summary page covering time dilation and length contraction.
Mass, length and time.
Flowchart through many equations. Site was easy to follow if uninteresting. Links to SI units and conversions. Many branches to the tree.
Disappearing Act
Certain patterns confuse your eyes and brain, causing you to misjudge the size of a circle, or the length of a line. This site contains a shockwave demonstrations of an optical illusion.
Depth Spinner
Certain patterns confuse your eyes and brain, causing you to misjudge the size of a circle, or the length of a line. This site contains a shockwave demonstrations of an optical illusion.


