PHYS165 / PHYS 165 Module 10: (Latest
Update 2026) Physics | Questions &
Answers | Grade A | 100% Correct -
Portage Learning
Continuous Variables
have any real value
quantized variable
a variable that has the smallest value and all possible integer multiple of that smallest
value.
Millikan's Oil Drop Experiment
1909, Robert took two metal plates , a variable electric power supply and some oil in a
spray bottle. The plates were put one on top of the other. A hole was made on the top
plate. Top plate had positive charge and the bottom plate had negative charge. He
sprayed oil through the hole into the space between the plates. He adjusted the voltage
to make the oil droplet reach equilibrium. He calculated the charge of the drop of oil. He
performed the experiment thousands of times.
this experiment proved : the charge of an object is quantized.
Blackbody
an ideal material that absorbs all frequencies of electromagnetic radiation and emits all
frequencies.
, it absorbs all frequencies then appears black.
has an inverse proportion between the wavelength and the maximum intensity.
Max Planck's theory
a blackbody is made up of tiny oscillators ( atoms or groups of atoms) and that the
oscillators can only give off energy when their own energy changes by certain amounts.
Energy given off at a certain frequency
E = h*f
Planck's Constant
h= 6.63 x 10 ^-34 Js
Photon
packet of energy
Energy given off when counting photons
E= nhf
The Photoelectric Effect
Discovered by Heinrich Hertz in 1887.
under the right conditions, when light shines on certain metals, electrons are ejected
from the metal.
Photoelectric Effect 1
an electroscope is negatively charged and when ultraviolet light is shined on the
electroscope it discharges quickly.
Update 2026) Physics | Questions &
Answers | Grade A | 100% Correct -
Portage Learning
Continuous Variables
have any real value
quantized variable
a variable that has the smallest value and all possible integer multiple of that smallest
value.
Millikan's Oil Drop Experiment
1909, Robert took two metal plates , a variable electric power supply and some oil in a
spray bottle. The plates were put one on top of the other. A hole was made on the top
plate. Top plate had positive charge and the bottom plate had negative charge. He
sprayed oil through the hole into the space between the plates. He adjusted the voltage
to make the oil droplet reach equilibrium. He calculated the charge of the drop of oil. He
performed the experiment thousands of times.
this experiment proved : the charge of an object is quantized.
Blackbody
an ideal material that absorbs all frequencies of electromagnetic radiation and emits all
frequencies.
, it absorbs all frequencies then appears black.
has an inverse proportion between the wavelength and the maximum intensity.
Max Planck's theory
a blackbody is made up of tiny oscillators ( atoms or groups of atoms) and that the
oscillators can only give off energy when their own energy changes by certain amounts.
Energy given off at a certain frequency
E = h*f
Planck's Constant
h= 6.63 x 10 ^-34 Js
Photon
packet of energy
Energy given off when counting photons
E= nhf
The Photoelectric Effect
Discovered by Heinrich Hertz in 1887.
under the right conditions, when light shines on certain metals, electrons are ejected
from the metal.
Photoelectric Effect 1
an electroscope is negatively charged and when ultraviolet light is shined on the
electroscope it discharges quickly.
