Radiation Energy Study Set: Chemistry Terms on Waves

Hertz (Hz)

What is the base unit of measure for frequency?

meters (m)

What is the base unit of measure for wavelength?

meters/second (m/s)

What is the base unit of measure for Velocity?

electron volt (ev)

What is the base unit of measure for energy?

veloctity = frequency x wavelength

v = f x λ

What is the wave equation for velocity?

"c" = f x λ

What is the electromagnetic wave equation?

-.9Km means converts to 900m

-photon means the velocity is "c" = 3x10^8 m/s

3x10^8 m/s = f x 900m

divide both sides by m (900)

answer is 3.33 x 10^5Hz

What formula would you use to determine the frequency of a photon with a wavelength of .9km?

-5000m means doesn't need converted to m

-photon means the velocity is "c" = 3x10^8 m/s

3x10^8 m/s = f x 5000m

divide both sides by m (5000)

answer is 60000 or 6x10^4Hz

What formula would you use to determine the frequency of a photon with a wavelength of 5000m?

wavelength decreases

energy increases

If frequency increases, what happens to wavelength and energy?

wavelength decreases

frequency increases

If energy increases, what happens to wavelength and frequency?

energy decreases

frequency decreases

If wavelength increases, what happens to energy and frequency?

higher

Shorter wavelength means _____ frequency and energy?

lower

longer wavelength means _____ frequency and energy?

inversely

Wavelength and frequency are _____ related

inversely

wavelength and energy are ____ related

frequency

energy is directly proportional to ____

its not produced in photon form and does not have a constant velocity

why is ultrasound not found on electromagnetic spectrum?

moving molecules

ultrasound if a wave of what?

matter (there is no matter in a vacuum)

ultrasound requires what? (vs electromagnetic energy in a vacuum)

radiofrequency

Radio and Tv are identified by which type of transmission?

low energy

low frequency

long (increased) wavelength

radiofrequency has ____ energy, _____ frequency, and ______ wavelength

MRI

What modality uses radiofrequency?

nanometers (nm)

because it is a small section of the electromagnetic spectrum

Visible light is measured in what unit, and why?

0 - 80kev

An 80 Kvp beam contains photons

from

MUCH more

xray photons have more or less energy than visible light photon or RF photon?

by their energy

how are photons generally identified?

it increases

as Kvp increases, what happens to overall energy?

frequency increases

wavelength decreases

As Kvp increases, energy increases and what happens to frequency and wavelength?

wavelength

Visible light is identified by

frequency

radiofrequency is identified by

energy

xrays are identified by

meters / second

what is the base unit for velocity

electric and magnetic

what fields are found around a photon?

sinusoidal or sine wave

in what fashion to photons move?

sine wave

what is this called?

a pulse (crest and valley)

what is each bump in a sine wave called?

cycle

2 bumps in a sine wave are referred to as a what?

amplitude

frequency

wavelength

velocity

all waves have what major characteristics?

Height of a wave

what is amplitude?

# of crests and valleys in a period of time

what is frequency?

distance from one crest to the next (or valley to valley)

what is wavelength?

lambda λ

what symbol is used for wavelength?

Hz

what is the base unit for frequency?

meters

what is the base unit for wavelength?

meters/second

what is the base unit for velocity?

electron volts

what is the base unit for energy?

electromagnetic spectrum

what is this image representing?

increases

referring to the electromagnetic spectrum, as you move up the spectrum, what happens to energy?

decreases

referring to the electromagnetic spectrum, as you move up the spectrum, what happens to wavelength?

increases

increases