* Described in terms of their frequency. * Have the longest wavelength and lowest energy. * Carry signals for television, cellular phones, and radio stations. * Non-ionizing radiation.

* Have wavelengths shorter than radio waves. * Can be used to heat food, or used in radar. * Non-ionizing

* Also known as IR * Lies between the visible light and microwaves. * Can be observed in objects producing heat. * Broken into three categories: Near, Mid, and Far. * Far = closest to microwaves * Near = closest to visible light * Non-ionizing

* Described in terms of wavelength. * The only part of the EM Spectrum visible to the human eyes. * Occupies the smallest area of the spectrum.

* Have wavelengths ranging from 400 nm to 700 nm. * Photons of light travel in a straight line but can be deviated by refraction. * Non-ionizing

* Located between the visible light and x-ray spectrum. * Responsible for molecular interactions that can cause sunburn. * Can be both non-ionizing and ionizing

type of uv that is closest to the visible light spectrum. Used as black light.

type of uv that is mostly absorbed by the ozone layer.

type of uv that is absorbed by the ozone layer. lonizing part of the UV

* Characterized by the energy contained in its photon. * Energy Range: 10 keV to 50 keV * Have higher frequency and shorter wavelength than light, thus having more energy.

* Originate from the electrons of an atom. * Some of this (like the ones used in Linear Accelerators), can achieve energies higher than gamma * Ionizing

* Have the highest frequency and shortest wavelength, thus having the highest energy in the spectrum. * Only differs from x-rays due to its origin (nucleus). * ionizing

can be represented by using a sinewave

Parts of Sinewave

travel in the form of photons that have the velocity of the speed of light.

One-half the range from crest to valley over which the sinewave varies.

* The number of wavelengths that pass a point of observation per second. * Represented by f * Unit of measurement = Hertz (Hz)

* The distance from one crest to another, one valley to another, or from any point on the sinewave to the next corresponding point. * Represented by Lambda (^) * Unit of measurement = meter (m)

* Measured in electron volts (eV) * As the frequency increases, the wavelength decreases, and the energy increases.

Velocity and Frequency’s Relationship are

Velocity and Wavelength

Frequency and Wavelength

used to mathematically express the relationship of these three parameters * Used for both soundwaves and electromagnetic energy

* Used for electromagnetic energy * Simplified method as the velocity of electromagnetic energy is the same.

interact with matter most easily when the matter is approximately the same size as it

interacts with living cells, such as the rods and cones of the eyes

interacts with molecules

interact with electrons & atoms

Photons of what tend to behave as particles

Photons of what tend to behave as waves

* This describes the relationship of radiation intensity and the distance from the radiation source. * can also be used to calculate radiation exposure, radiation dose, and Kerma.

The intensity of a radiation is directly proportional to the square of the distance of the object from the source. True or False

emitted is spread out over an increasingly larger

Radiologic unit that is * The amount of radiation delivered to a point. * Measures how much ionization occurs in the air through which radiation travels.

what radiologic unit is this: * Conventional Unit: Roentgen * Sl Unit: Coulomb per Kilogram of Air (C/Kg) * 1 Roentgen = 2.58 x 10^-4 C/Kg or 1 C/kg = 3876 R

Radiologic Unit that is * A unit of radiation exposure or intensity * The kinetic energy transferred from photons to electrons during ionization and excitation. * Related to, but not the same as absorbed dose.

what radiologic unit is this * Si Unit: joule per kilogram (1/kg) * 1J/kg = 1

* MEASURE of the ENERGY DEPOSITED IN A MEDIUM by ionizating radiation. * It is the radiation absorbed per unit mass.

what radiologic unit is this? * Conventional Unit: Rads * Sl Unit: Gray or J/kg * 100 Rads = 1 Gray

* Used to express the dose received by workers in their environment.

* Used to express relative risk to humans, both patients and personnel. * The equivalent whole-body dose and takes into account the specific organs and areas of the body irradiated.

what 2 radiologic unit is this? * Conventional Unit: Rems (Roentgen Equivalent Man) * Sl Unit: Sieverts (Sv) * 100 rems = 1 Sv

* It is the number of disintegration per unit time. * Measure of ionizing radiation released by a radioactive material.

what radiologic unit is this? * Conventional Unit: Curie (Ci) * Si Unit: Becquerel (Bq) * 1 Curie = 3.7 × 10^10 Bq

have the responsibility of reducing unnecessary exposure of the patients and personnel.