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WorksheetsEM SPECTRUM
Total questions: 11
Worksheet time: 6mins
The varying electric field and magnetic field in an electromagnetic wave are oriented in what direction with respect to their direction of propagation?
Parallel
Perpendicular
Antiparallel
At a 45° angle
Which of the following colors of the visible spectrum has the shortest
wavelength?
red
yellow
green
blue
(a) radiation can tell you about temperature
variation in different parts of your body?
For an electromagnetic wave traveling through a vacuum, what happens to its speed as the frequency increases?
speed increases
speed decreases
It depends on the wavelength
remains the same
What does oscillating electric and magnetic
fields reproduce?
(a)
The main difference between a radio wave and a light wave is its ______
speed
wavelength
frequency
both b and c
Which of the following is the least penetrating EM wave?
gamma rays
ultraviolet rays
infrared rays
x-rays
Which of these electromagnetic waves has the lowest speed?
X-rays
Light waves
infrared
none
What Electromagnetic wave carries the lowest energy?
(a)
Which of the following EM wave source is least hazardous to the human body?
mobile phones
wifi networks
thermal thermometer
UV rays from the sun
Which is not an ionizing EM wave?
X-rays
Gamma rays
infrared
ultraviolet
