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General physics
Terms realting to physics that are not fit for other subcategories.
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General physics
Refraction
Physics; General physics
The bending of light from its straight line path when it travels from one medium to another.
Refractive index
Physics; General physics
The ratio of speed of light in vacuum to that in the medium.
Relative density
Physics; General physics
The ratio of density of a substance to the density of water at 4 .
Relative humidity
Physics; General physics
The percentage of the amount of water vapour actually present in a certain volume of the air to the amount of water vapour needed to saturate it.
Resolving power
Physics; General physics
A quantitative measure of the ability of an optical instrument to produce separable images of different points of an object.
Resonance
Physics; General physics
When the frequency of an external force matches the natural frequency of the body then the body oscillates with large amplitude.
Restoring force
Physics; General physics
The force which tends to bring an oscillating body towards its mean position whenever it is displaced from the mean position.
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