Physics is a study of what is. It is not necessarily real because it is a human concept and not the nature itself. It is the study of such.
Physics discussion (please read the note)
Study of matter, of what is
Electricity is the flow of electrons from a negative charge to a positive charge. Electricity generates magnetic field.
Forces, Fields and Electricity discussion (please read the note)
Moving electrons, Charge, force-inducing electrical property, Voltage, electrical tension between two points, Resistivity, material opposition of electric current, Electrical resistance = dVoltage / Electric Current. Measured in Ohms, Known as Ohms Law, Conductivity, ability to conduct electric current, Magnetism, Electromagnetism, Lenz's Law
Magnetic Field can create a momentum
Mass and Charge, number of neutrons and total atomic mass determines the characteristics of an atom, Periodic table uses that information to organize the elements, Atoms can be stable or unstable, unstable atoms decay through radioactivity, alpha radiation = He loss, beta radiation = conversion of neutron to proton and +e-, gamma radiation e- mass loss, releases a lot of energy with fission or fusion nuclear reactions, power plants use these reactions by limiting the amount of radioactive material present, thus preventing a critical mass, different number of neutrons in the same element determines its isotopes, Atomic weight, atomic mass unit, mass defect, atomic number, isotopes, stable, unstable, decay, radioactive, alpha, He atoms, beta, electrons, gamma, mass defect, releases a lot of energy, energy can be harvested, weapons, electricity, research, half-life
Class-wide discussions and e-mail conversations, teaching each other what we have learned thus far.
Neat videos, e-mail conversations.
Using camera and other available parts to make a coil gun. Using our knowledge of electricity and circuitry to accomplish a different goal than that what the device was originally made for.
Project #1 - Research, team collaboration to get the coilgun working. Primary steps initiated.
Travels at speed of light
The higher the frequency, the more likely the radiation is ionizing
Differences in wavelength results in different colors
Energy carried is dependent upon frequency and amplitude
Propagation may occur both in vacuum and material
380-435 nm - Violet 436-500 nm - Blue 501-520 nm - Cyan 521-565 nm - Green 566-590 nm - Yellow 591-625 nm - Orange 626-740 nm - Red
Anything with higher frequency will be ionizing, Ex: mutations due to damage to DNA
Anything at the visible spectrum or below is safe, Ex: Infrared, Radio waves, etc.
Secondary colors may be created by overlapping primary color EMR
Alternative approach is to use subtractive model by mixing red, yellow, blue, or magenta, yellow, and cyan to create necessary colors
NOT SURE ABOUT: Physical vs. Physiological light
Reflection, When a ray strikes a surface, it will partially reflect at an equal but opposing angle
Refraction, When a way enters a surface / material, it may bend and change its velocity
Dispersion, When light passes through a material, the wave's different frequencies will travel at different velocity while in that material (according to their frequencies)
Diffraction, Bending or spreading out of waves around small objects or openings
Interference, Two waves positioned into a new wave frequency
Polarization, Helps determine the orientation of wave oscillations
Absorption, EMR may be absorbed by a material that it enters
Scattering, The trajectory of EMR may be deviated from a simple straight line
Transparency, Transparent materials can be passed through with EMR freely, Translucency allows light to pass diffusively, The opposite of translucency is opacity
Fluorescence, Property that allows a material to emit a different wave EMR after absorbing another frequency wave
Phosphorescence, Unlike fluorescence, phosphorescence does re-emit waves immediately, it may do so at much slower rate of a lower frequency EMR