Electromagnetic Spectrum - Lesson Review
Why are gamma rays the most dangerous form of electromagnetic radiation?
Gamma rays are the most dangerous form of electromagnetic radiation because they have the most energy.
How are gamma rays useful?
Gamma rays can be used to destroy cancerous cells.
What are the wave properties of X rays and gamma rays?
X rays and gamma rays are the electromagnetic waves with the shortest wavelengths and highest frequencies.
Explain how X rays can be used to "take pictures" of bones and teeth.
X rays are absorbed by teeth and bones because they do not have enough energy to pass through these dense structures. As a result, the x-rays are absorbed by the teeth and bones, causing these areas to appear bright on the x-ray film show.
Definition: electromagnetic waves with the longest wavelengths Terms: a. radio waves b. infrared light c. ultraviolet light d. microwaves e. electromagnetic spectrum f. visible light g. gamma rays
a
The bright white areas on an X ray film show where the rays were ________ by bones or teeth.
absorbed
In AM radio broadcasts, sounds are encoded by changing the __________ of radio waves.
amplitude
Definition: light with the longest wavelengths Terms: a. radio waves b. infrared light c. ultraviolet light d. microwaves e. electromagnetic spectrum f. visible light g. gamma rays
b
Television broadcasts encode pictures by changing the: a. frequency of radio waves. b. amplitude of radio waves. c. wavelength of radio waves. d. speed of radio waves.
b
Definition: light with the shortest wavelengths Terms: a. radio waves b. infrared light c. ultraviolet light d. microwaves e. electromagnetic spectrum f. visible light g. gamma rays
c
Which of the following choices lists electromagnetic waves from lower to higher frequencies? a. radio waves, infrared light, microwaves b. ultraviolet light, infrared light, X rays c. infrared light, ultraviolet light, gamma rays d. visible light, microwaves, ultraviolet light
c
Which type of electromagnetic waves are used for radar? a. ultraviolet waves b. radar waves c. microwaves d. X rays
c
Compared with FM radio broadcasts, AM radio broadcasts can: a. carry more information. b. be heard more clearly. c. pass through the ionosphere. d. travel to more distant receivers.
d
Definition: radio waves with the highest frequencies Terms: a. radio waves b. infrared light c. ultraviolet light d. microwaves e. electromagnetic spectrum f. visible light g. gamma rays
d
Uses of ultraviolet light include: a. killing bacteria. b. sterilizing surgical instruments. c. making vitamin D by the skin. d. all of the above
d
Visible light with the longest wavelength appears to be: a. violet. b. green. c. blue. d. red.
d
Which electromagnetic waves have a wavelength about as wide as the nucleus of an atom? a. radio waves b. infrared light c. ultraviolet light d. gamma rays
d
Definition: full range of wavelengths of electromagnetic radiation Terms: a. radio waves b. infrared light c. ultraviolet light d. microwaves e. electromagnetic spectrum f. visible light g. gamma rays
e
Definition: electromagnetic waves with wavelengths between infrared and ultraviolet light Terms: a. radio waves b. infrared light c. ultraviolet light d. microwaves e. electromagnetic spectrum f. visible light g. gamma rays
f
Gamma rays cannot pass through bones and teeth. - True or False
false
Radar stands for radio detection and recovery. - True or False
false
The only use of X rays is to make images of bones and teeth inside the body. - True or False
false
Visible light consists of a very wide range of wavelengths. - True or False
false
Visible light has higher-frequency waves than ultraviolet light. - True or False
false
Definition: electromagnetic waves with the greatest energy Terms: a. radio waves b. infrared light c. ultraviolet light d. microwaves e. electromagnetic spectrum f. visible light g. gamma rays
g
Electromagnetic waves with the highest frequencies are called __________.
gamma rays
Night-vision goggles detect __________ light waves.
infrared
Cell phone transmissions use radio waves called __________.
microwaves
Cell phone transmissions are carried by microwaves. - True or False
true
Gamma rays can be used to destroy cancer cells. - True or False
true
Radar is used for tracking storms. - True or False
true
Radio waves have the least amount of energy of all electromagnetic waves. - True or False
true
You should protect your skin from ultraviolet light even on cloudy days. - True or False
true
Too much exposure to __________ light waves causes sunburn and skin cancer
ultraviolet
The colors of visible light depend on the __________ of light waves.
wavelengths
