What is the speed of electromagnetic waves in a vacuum?
299,792,458 meters per second
100 meters per second
150,000,000 meters per second
It varies depending on the frequency
#2
What is the electromagnetic spectrum?
A range of frequencies of electromagnetic radiation
A type of optical illusion
A specific frequency used in wireless communication
A measurement unit for electromagnetic waves
#3
Which scientist is credited with formulating the theory of electromagnetism?
Albert Einstein
Michael Faraday
Isaac Newton
Nikola Tesla
#4
What is the SI unit of frequency?
Watt
Hertz
Ohm
Ampere
#5
What is the frequency range of visible light?
20 Hz to 20 kHz
30 GHz to 300 GHz
430 THz to 750 THz
10 MHz to 100 MHz
#6
Which of the following equations represents the relationship between the speed of light (c), wavelength (λ), and frequency (f) of an electromagnetic wave?
λ = c/f
c = λ*f
f = c/λ
c = f/λ
#7
Which of the following electromagnetic waves has the shortest wavelength?
Radio waves
Microwaves
X-rays
Gamma rays
#8
What is the relationship between the electric field (E) and the magnetic field (B) in an electromagnetic wave?
They are perpendicular to each other and oscillate in phase
They are parallel to each other and oscillate in phase
They are perpendicular to each other and oscillate out of phase
They are parallel to each other and oscillate out of phase
#9
Which of the following materials is typically transparent to visible light but opaque to ultraviolet radiation?
Glass
Plastic
Aluminum foil
Wood
#10
Which of the following electromagnetic waves is used in MRI (Magnetic Resonance Imaging) machines?
Gamma rays
X-rays
Microwaves
Radio waves
#11
In which medium do electromagnetic waves travel the fastest?
Vacuum
Water
Air
Glass
#12
What phenomenon allows the bending of electromagnetic waves around obstacles?
Reflection
Refraction
Diffraction
Interference
#13
What is the primary mechanism by which electromagnetic waves transfer energy?