You use a spectrophotometer.
Sabas equipment
The defining colour in glasses means the colour used in the frame, as it is most visible. So the defining colour of nerd glasses means the same, the colour of the nerd glasses frame.
Some test instruments used in electronics are:Multimeter - Used to measure voltage, ampere and resistanceOscilloscope - Used to measure frequency and oscillations
aluminum
You are taking changes buying any used equipment or even rebuilt equipment from any place.
protractor
A thermometer.
scales
graduated cylinder
a ruler
thermometer
Pyrometer
a photodiode
A Scale.
Hertz is used to measure sound frequency (how high or low the sound is). Decibels are used to measure how loud or soft a sound is.
example:balance scale
a scale