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Strange as it may seem, the speed of all electromagnetic waves was predicted long
before it was ever measured. After the speed was predicted, measurements of light-
speed supported the growing suspicion that light is electromagnetic radiation, because
the measured speed was so close to the predicted speed.
Measuring the speed of light is not easy, and several clever methods had to be invented
in order to do it. Calculus was almost certainly used at many points in the application
of these methods.
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Is trigonometry part of calculus?
It is certainly used in calculus, just as calculus can be used in trigonometry.
Which variable is used to represent the speed of light?
None. The speed of light is usually assumed to be constant. The symbol used to represent the speed of light is "C", as in E=MC2. Then why is it called a variable speed?
Is calculus used in quantum physics?
yes it is
What is formula of speed?
The definition of speed: speed = distance / time. You can also write this as distance = speed x time. This is used to do various calculations related to speed. The above is actually only valid for a constant speed. If the speed changes over time, speed - or more precisely velocity - is defined (using derivatives) as v = ds/dt. However, you need to have basic notions of calculus to work with this.
Speed of light squared?
That is used as a conversion factor between mass and energy.
