PPT 4 Flashcards
What is a good example of transmission?
When light penetrates the glass of a window
What is a good example of absorption?
Fried egg on hot pavement
What is attenuation?
Some of the energy is absorbed
What is frequency?
Number of cycles or wavelengths per unit time
What is velocity?
Rate of change of an object’s position over time; speed.
Velocity is a vector - what does that mean?
A vector is a quantity or measurement that has magnitude, unit, and direction.
Explain what perpendicular fields means:
2 fields (electric and magnetic). One field is vertical, one field is horizontal - they run perpendicular to one another.
Energy is _____ proportional to frequency.
directly
Energy is _____ proportional to wavelength.
inversely
Frequency is _____ proportional to wavelength.
inversely
2 atoms with the same number of protons are called ____.
Isotopes
2 atoms with the same number of neutrons are called ____.
Isotones
2 atoms with the same number of nucleons (both protons and neutrons) are called ____.
Isobars
A metastable, or unstable, atom is called a _____.
Isomer
True or False:
Electromagnetic fields are perpendicular.
True
