Correct Answer - Option 4 : a, b, c and d
The correct answer is a, b, c and d.
-
Television waves, Ultraviolet rays, X-rays, sun rays all are examples of electromagnetic waves.
- Radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays are all types of electromagnetic radiation.
- Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.
-
Electromagnetic waves are also known as EM waves that are produced when an electric field comes in contact with the magnetic field.
- It can also be said that electromagnetic waves are the composition of oscillating electric and magnetic fields.
- The electromagnetic field is produced by an accelerating charged particle.
- Electromagnetic waves are nothing but electric and magnetic fields travelling through free space with the speed of light c.
- An accelerating charged particle is when the charged particle oscillates about an equilibrium position.
- If the frequency of oscillation of the charged particle is f, then it produces an electromagnetic wave with frequency f.
- The wavelength λ of this wave is given by λ = c/f.
-
Electromagnetic waves transfer energy through space.
-
Applications of Electromagnetic Waves
- Electromagnetic waves can transmit energy through vaccum.
- Electromagnetic waves play an important role in communication technology.
-
Electromagnetic waves are used in RADARS.
- UV rays are used to detect forged bank-notes. Real bank-notes don’t turn fluorescent under UV light.
- Infrared radiation is used for night vision and is used in the security camera.
