Which abbreviation refers to a term that literally means "below red"?

IR
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Related trivia

What tool do people at sea use to measure distance with echoes?
Sonar
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According to Ohm's Law, what would the resistance be in a circuit with 40 volts and 8 amps?
5 Ohms
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Who discovered the rotating magnetic field that is the basis of Alternating Current?
Nikola Tesla
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Who was the first woman to win a Nobel Prize in Physics?
Maria Sklodowska-Curie
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How many quarks are in an electron?
None
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What is the term for the capacity of a body or system to do work?
Energy
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What sort of electricity do you get when you rub two balloons and they stick together?
Static
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What's the term used to indicate the speed of a lens?
F-Stop
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About how fast does sound travel in meters per second?
340
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What word describes a material which maintains a magnetic field after an external field is removed?
Ferromagnetic
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What liquid is used as a standard when measuring density?
Water
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What is the scale used to measure tornadoes?
The Fujita Scale
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Which century was Isaac Newton born in?
1600's
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In math, "pi" is equal to?
3.141592654
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What type of lens has a thin middle and makes objects appear smaller?
Concave
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What constant is referred to as "The Universe's Clock"?
Speed of Light
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What is it called when a current skips part of the circuit?
Short Circuit
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How many coulombs does one ampere-hour equal?
3,600 Coulombs
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The Bernoulli Effect concerns what physical system?
A Moving Fluid
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How many watts is one horsepower?
746 W
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What physical constant did Henry Cavendish first determine using two weights and a cantilever?
Gravitational Constant
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If you throw a ball in the air, what curve does it trace out?
Parabola
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What measure is used to express reactance in conductors and capacitors?
Ohms
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How many grams are in a pound?
454
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