What are Electromagnetic Waves?
- Electromagnetic waves, such as light, involve the oscillation of electric and magnetic fields.
- Unlike mechanical waves which vibrate particles such as those in air, electromagnetic waves vibrate photons.
- All electromagnetic waves have the same speed in a vacuum, which is written as c.
- Where they differ is in their frequency and wavelength.
- As their speed is constant, if frequency increases, then wavelength decreases and if frequency decreases then wavelength increases so that λf= c.
Electromagnetic Radiation
- Electromagnetic waves have many real-world applications.
- For example, microwaves, radios, infrared sensors, x-rays, MRI scanners, and tanning beds all use electromagnetic waves of different frequencies.
- Light is also a type of electromagnetic wave!
Comparison Between Mechanical and Electromagnetic Waves
Sources
https://fity.club/lists/suggestions/electromagnetic-spectrum/