Vocabulary
The entire range of the electromagnetic waves is known as _______
the electromagnetic spectrum
Electromagnetic waves travel fastest in a ___________.
vacuum
Frequency; wavelength; energy of radio waves
a. 300 GHz- 3Hz; 1nm- 1 m; 12.4 feV- 1.24 meV
b. 300 GHz-300 MHz; 1mm-1meter, 1.24x10-6 eV -1.24 meV
c. 405 THz- 300 GHz; 750nm- 1mm; 1.24 meV- 1.7eV
a. 300 GHz- 3Hz; 1nm- 1 m; 12.4 feV- 1.24 meV
Which of the following devices uses infrared waves?
1. cellular telephone
2. satellite
3. television remote control
4. radar
3. television remote control
These rays are used for mapping space, fixing cracked pipes, and treating cancer patients.
gamma waves
What type of waves do not require matter to carry energy?
electromagnetic
A ____________ is a volume of space that is essentially empty of matter.
vacuum
As the frequency of an electromagnetic wave increases, the wavelength _______.
decreases
Frequency, wavelength, and energy of Visible Light
a. 790 THz- 405THz;390nm-750nm; 1.7 eV- 3.3 eV
b. 30 PHz-790 THz; 10nm- 400nm; 3eV- 124 eV
c. 30 EHz- 30 PHz; 0.01- 10nm; 120eV- 120keV
790 THz- 405THz;390nm-750nm; 1.7 eV- 3.3 eV
These waves are used in night vision googles.
infrared
These waves are used for Bluetooth, mobile communication, and audio transmissions.
Wavelengths between 750 and 400 billionths of a meter that can be detected by the human eye
visible light
Electromagnetic waves travel as ______ waves.
transverse
The energy of electromagnetic waves _________ with increasing frequency.
increases
Frequency; wavelength; energy of microwaves
a. 300 GHz- 3Hz; 1nm- 1 m; 12.4 feV- 1.24 meV
b. 300 GHz-300 MHz; 1mm-1meter, 1.24x10-6 eV -1.24 meV
c. 405 THz- 300 GHz; 750nm- 1mm; 1.24 meV- 1.7eV
b. 300 GHz-300 MHz; 1mm-1meter, 1.24x10-6 eV -1.24 meV
These waves have the smallest wavelengths and the most energy of any wave in the electromagnetic spectrum
Gamma waves
Though these waves are invisible to the human eye, some insects, like bumblebees, can see them!
ultraviolet waves
System of satellites, ground monitoring stations, and receivers that can determine a person’s location. What sort of EM waves is used in GPS?
1. Gamma rays
2. X rays
3. Radio waves
4. Visible light.
3. Radio waves
An electromagnetic wave travels ___________ in air and ___________ in water.
air = faster
water = slower
The electromagnetic spectrum starts with the lowest ___________ and the longest_________.
lowest frequency
longest wavelength
Frequency, wavelength, and energy of X-ray
a. 790 THz- 405THz;390nm-750nm; 1.7 eV- 3.3 eV
b. 30 PHz-790 THz; 10nm- 400nm; 3eV- 124 eV
c. 30 EHz- 30 PHz; 0.01- 10nm; 120eV- 120keV
c. 30 EHz- 30 PHz; 0.01- 10nm; 120eV- 120keV
These waves can be used in communication, heating, and are considered a high-frequency radio wave.
microwave
In visible light the red color has ___________ frequency and the blue color has _________frequency.
red = low
blue = high
What is the speed of electromagnetic waves in a vacuum?
3 x 108 m/s or the speed of light
Electromagnetic waves with the longest wavelengths in the electromagnetic spectrum are called __________.
Radio waves
Name four properties of electromagnetic waves
transfer energy
are transverse waves
travel at the speed of light in a vacuum
travel slower in a medium
Frequency; wavelength; energy of Infrared
a. 300 GHz- 3Hz; 1nm- 1 m; 12.4 feV- 1.24 meV
b. 300 GHz-300 MHz; 1mm-1meter, 1.24x10-6 eV -1.24 meV
c. 405 THz- 300 GHz; 750nm- 1mm; 1.24 meV- 1.7eV
c. 405 THz- 300 GHz; 750nm- 1mm; 1.24 meV- 1.7eV
These waves are used in: airports, medical and dental clinics.
X-rays
What EM waves has a wavelength of less than 0.01 nm, frequency of more than 10 EHz, and energy of 120 keV - 300+ GeV
Gamma Rays
Electromagnetic waves are created by _________.
oscillating electrical and magnetic fields
Wavelengths between 400 and 40 billionths of a meter that can cause skin cancer with prolonged exposure
ultraviolet light
______________ ionize atoms, and are thus biologically hazardous.
UV lights
X rays
gamma waves
Frequency, wavelength, and energy of Ultraviolet
a. 790 THz- 405THz;390nm-750nm; 1.7 eV- 3.3 eV
b. 30 PHz-790 THz; 10nm- 400nm; 3eV- 124 eV
c. 30 EHz- 30 PHz; 0.01- 10nm; 120eV- 120keV
b. 30 PHz-790 THz; 10nm- 400nm; 3eV- 124 eV
These waves are used in smart lighting and smart homes and naked eyes can sense them.
visible light
A radio wave has the __________ wavelength and the _____________ frequency.
longest wavelength
lowest frequency
Gamma waves have the _________frequency and the _____________ wavelength.
highest frequency
shortest wavelength