Units
Let There Be Light
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Physics Potpourri
100
The base SI unit for measuring length
What is the meter?
100
This term for light is usually abbreviated EM
What is electro-magnetic?
100
The lowest frequency humans are able to hear with their ears
What is 20 Hz?
100
This is the process of converting digital bits into waveform signals for transmission.
What is modulation?
100
An object in free fall near Earth accelerates at approximately this rate.
What is 9.8 m/s2 down?
200
This prefix means 106
What is mega
200
This region of the electromagnetic spectrum has the longest wavelength.
What is radio?
200
The part of a speaker which directly pushes on the air
What is the diaphragm?
200
This organization regulates communication frequencies and transmission power in the United States.
What is the FCC?
200
A rocket rising in space is an example of this law of motion.
What is Newton's Third Law of Motion?
300
This derived SI unit measures electrical resistance.
What is the ohm?
300
These waves have the shortest wavelengths and the highest frequencies.
What are gamma rays
300
The name of the physical law which describes electric currents creating magnetic fields
What is Ampere's Law?
300
This analog modulation changes the spacing between wave peaks rather than their amplitude.
What is frequency modulation (FM)?
300
LED stands for this.
What is light emitting diode?
400
The SI unit for energy, commonly used for work or heat.
What is a joule?
400
All electromagnetic waves travel at this speed in a vacuum.
What is 3.00×108 m/s?
400
Voice coils must be made of this type of material
What is a conducting wire?
400
This modulation varies only between discrete amplitude levels and is considered the simplest digital scheme.
What is amplitude shift keying?
400
Prof. Hohertz dressed as this famous physicist for Halloween
Who is James Clerk Maxwell?
500
The SI unit defined as kg·m/s²
What is a Newton?
500
If a photon’s frequency doubles, this physical quantity doubles as well.
What is energy?
500
This much power is delivered to a 6 Ohm speaker driven at 12 Volts
What is 24 Watts?
500
This Hollywood star is known for her work in frequency hopping (but she did not invent wifi)
Who is Hedy Lamarr?
500
Protons and neutrons are made of these two subatomic particles
What are up and down quarks?