Podcast
Questions and Answers
Which of the following statements best describes an electromagnetic waves with a long wavelength?
Which of the following statements best describes an electromagnetic waves with a long wavelength?
- It has a low frequency and can only travel in a medium.
- It has a low frequency and can travel in a vacuum. (correct)
- It has a high frequency and can travel in a vacuum.
- It has a high frequency and can only travel in a medium.
The electric and magnetic fields of an electromagnetic wave are
The electric and magnetic fields of an electromagnetic wave are
- out of phase and perpendicular to each other
- out of phase and not perpendicular to each other
- in phase and not perpendicular to each other
- in phase and perpendicular to each other (correct)
Consider an oscillator which has a charged particle and oscillates about its mean position with a frequency of 300 MHz. The wavelength of electromagnetic waves produced by this oscillator is (Note: 1 MHz = 1,000,000 Hz)
Consider an oscillator which has a charged particle and oscillates about its mean position with a frequency of 300 MHz. The wavelength of electromagnetic waves produced by this oscillator is (Note: 1 MHz = 1,000,000 Hz)
- 1 m
- 10 m
- 1000 m
- 100 m (correct)
Find the frequency of an electromagnetic wave with a wavelength 2.75 x 10^-8 m.
Find the frequency of an electromagnetic wave with a wavelength 2.75 x 10^-8 m.
A wave with a low frequency would have relatively
A wave with a low frequency would have relatively
Which of the following graphs best represents the relationship of the frequency of an electromagnetic wave to its wavelength?
Which of the following graphs best represents the relationship of the frequency of an electromagnetic wave to its wavelength?
Which of the following is NOT true for electromagnetic waves?
Which of the following is NOT true for electromagnetic waves?
Find the wavelength of an electromagnetic wave with a frequency of 5.00 × 10^14 Hz.
Find the wavelength of an electromagnetic wave with a frequency of 5.00 × 10^14 Hz.
Compared to the speed of a sound wave in air, the speed of a radio wave in air is
Compared to the speed of a sound wave in air, the speed of a radio wave in air is
Electromagnetic waves are propagated through the interaction of
Electromagnetic waves are propagated through the interaction of
These are waves that are created as a result of vibrations between an electric field and magnetic field.
These are waves that are created as a result of vibrations between an electric field and magnetic field.
What is the speed of electromagnetic wave in a vacuum?
What is the speed of electromagnetic wave in a vacuum?
______ travels in waves.
______ travels in waves.
Transverse waves move up and down in patterns that have high points called ______
Transverse waves move up and down in patterns that have high points called ______
The low points of a transverse wave are called ______
The low points of a transverse wave are called ______
The distance between any two throughs or peaks is called the ______
The distance between any two throughs or peaks is called the ______
The height of a peak or trough is called the ______
The height of a peak or trough is called the ______
______ is the number of complete waves that pass by in one second.
______ is the number of complete waves that pass by in one second.
______ waves move by pushing forward and pulling back.
______ waves move by pushing forward and pulling back.
______ waves are examples of longitudinal waves.
______ waves are examples of longitudinal waves.
Waves on the surface of water are examples of ______ waves.
Waves on the surface of water are examples of ______ waves.
Match the scientists given below with their contributions.
Match the scientists given below with their contributions.
EM waves are disturbances in a field rather than in a medium.
EM waves are disturbances in a field rather than in a medium.
EM waves form when moving charged particles transfer energy through a field.
EM waves form when moving charged particles transfer energy through a field.
How are frequency and wavelength of an electromagnetic wave related?
How are frequency and wavelength of an electromagnetic wave related?
How are electromagnetic waves propagated?
How are electromagnetic waves propagated?
An electromagnetic wave has a frequency of 9.95x10^7 Hz. What is its wavelength?
An electromagnetic wave has a frequency of 9.95x10^7 Hz. What is its wavelength?
What is the frequency of a wave whose wavelength is 4.10 x 10^-12 m?
What is the frequency of a wave whose wavelength is 4.10 x 10^-12 m?
Calculate the frequency of an electromagnetic wave that has the speed of 3.00 x 10^8 m/s and a wavelength of 2 mm. (1 mm = 10^-3 m)
Calculate the frequency of an electromagnetic wave that has the speed of 3.00 x 10^8 m/s and a wavelength of 2 mm. (1 mm = 10^-3 m)
As the speed decreases, if we change the medium of electromagnetic waves from air to water, the frequency
As the speed decreases, if we change the medium of electromagnetic waves from air to water, the frequency
Electromagnetic waves travel
Electromagnetic waves travel
Which statement best describes a proton that is being accelerated?
Which statement best describes a proton that is being accelerated?
What is the speed of a EM wave in a vacuum?
What is the speed of a EM wave in a vacuum?
Who was this scientist famous of his theory of electromagnetism, which showed that light was electromagnetic radiation?
Who was this scientist famous of his theory of electromagnetism, which showed that light was electromagnetic radiation?
A wave has a frequency of 5.0 x 10^14 hertz in a vacuum. What is the wavelength of this wave?
A wave has a frequency of 5.0 x 10^14 hertz in a vacuum. What is the wavelength of this wave?
How much time does it take for an EM wave to reach a subject 6.0 meters across a room?
How much time does it take for an EM wave to reach a subject 6.0 meters across a room?
Which characteristic is the same for all types of EM waves traveling in a vacuum?
Which characteristic is the same for all types of EM waves traveling in a vacuum?
When an EM wave travels from one medium to another, what happens to its frequency?
When an EM wave travels from one medium to another, what happens to its frequency?
Who discovered the relationship between magnetism and electricity that serves as the foundation for the theory of electromagnetism?
Who discovered the relationship between magnetism and electricity that serves as the foundation for the theory of electromagnetism?
The distance between two crests or two troughs of a wave is called
The distance between two crests or two troughs of a wave is called
This scientist demonstrated the magnetic effect based on the direction of current. Who is this scientist?
This scientist demonstrated the magnetic effect based on the direction of current. Who is this scientist?
Which of the following is a TRUE statement about electromagnetic waves?
Which of the following is a TRUE statement about electromagnetic waves?
Flashcards
Electromagnetic Wave
Electromagnetic Wave
A disturbance that transfers energy through electric and magnetic fields.
Electromagnetic Spectrum
Electromagnetic Spectrum
The range of all possible electromagnetic wave frequencies and wavelengths.
Frequency
Frequency
The number of complete waves that pass a given point in one second.
Wavelength
Wavelength
Signup and view all the flashcards
Amplitude
Amplitude
Signup and view all the flashcards
Crest
Crest
Signup and view all the flashcards
Trough
Trough
Signup and view all the flashcards
Speed of light (c)
Speed of light (c)
Signup and view all the flashcards
Mechanical wave
Mechanical wave
Signup and view all the flashcards
Hertz (Hz)
Hertz (Hz)
Signup and view all the flashcards
Electromagnetic Induction
Electromagnetic Induction
Signup and view all the flashcards
Hans Christian Oersted
Hans Christian Oersted
Signup and view all the flashcards
Andre-Marie Ampere
Andre-Marie Ampere
Signup and view all the flashcards
Michael Faraday
Michael Faraday
Signup and view all the flashcards
James Clerk Maxwell
James Clerk Maxwell
Signup and view all the flashcards
Heinrich Hertz
Heinrich Hertz
Signup and view all the flashcards
Radio waves
Radio waves
Signup and view all the flashcards
Microwaves
Microwaves
Signup and view all the flashcards
Visible light
Visible light
Signup and view all the flashcards
Speed equation
Speed equation
Signup and view all the flashcards
Wave reflection
Wave reflection
Signup and view all the flashcards
Study Notes
Electromagnetic Wave Theory
- Electromagnetic waves are a combination of electric and magnetic fields
- They are produced by accelerating electric charges
- They travel at the speed of light in a vacuum (approximately 3 x 10⁸ m/s)
- They do not require a medium to travel
- They transfer energy through space
- They exhibit wave-like properties, including reflection, refraction, diffraction, and interference
- They are characterized by wavelength, frequency, and amplitude
Properties of Electromagnetic Waves
- Wavelength (λ): The distance between two corresponding points on successive waves; measured in meters (or other units of length). Shorter wavelengths correspond to higher energy.
- Frequency (f): The number of complete waves that pass a given point in one second; measured in Hertz (Hz). Higher frequencies correspond to higher energy.
- Amplitude: The maximum displacement of the wave from its equilibrium position; relates to the intensity or strength of the wave.
Relationship Between Wavelength and Frequency
- Inversely proportional
- As wavelength increases, frequency decreases.
- As wavelength decreases, frequency increases.
Speed of Electromagnetic Waves
- Constant in a vacuum; denoted by 'c'
- Approximately 3 x 10⁸ m/s
Electromagnetic Spectrum
- Range of electromagnetic radiation, categorized by frequency and wavelength
- Includes radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays
- Each type has unique properties and applications.
Electromagnetic Waves vs. Mechanical Waves
- Electromagnetic waves do not require a medium to travel; mechanical waves do.
- Electromagnetic waves transfer energy through changing electric and magnetic fields; mechanical waves transfer energy through vibrations of a medium.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
