Electromagnetic Waves: Identifying Non-Examples
Electromagnetic waves are disturbances in electric and magnetic fields that travel through space. They do not require a medium to propagate and include types like radio waves, microwaves, infrared, visible light, UV, X-rays, and gamma rays.
We need to identify the option that does not belong to this category.
- Radio waves: These are a form of electromagnetic radiation, used extensively in broadcasting and communication.
- Microwaves: These are also electromagnetic waves, shorter in wavelength than radio waves, used in radar, cooking, and communication.
- Infra-red radiation: This is electromagnetic radiation with wavelengths longer than visible light, often perceived as heat.
- Ultrasound: These are high-frequency sound waves. Sound waves are mechanical waves, which means they require a medium (like air, water, or solid) to travel. They are produced by vibrations and are fundamentally different from electromagnetic waves.
Based on this, Ultrasound is the only option that is not an electromagnetic wave.
Similar Questions
The energy of light (photon) is a form of ______.
- Infra-red rays are
- Which of the following are electromagnetic waves?
Important Questions from Electromagnetic Waves
The radio waves used for signaling and communication can be classified as which of the following?
- An electromagnetic wave propagates through a transparent, non-magnetic medium. If the relative permittivity of this medium is $\epsilon_r = 4$, and its relative permeability is $\mu_r = 1$, what is the speed of the electromagnetic wave in this medium? (Assume the speed of light in vacuum is $c = 3 \times 10^8$ m/s).
X-rays are produced when a target of suitable material element of high atomic mass is bombarded by a beam of fast moving and high energy particles such as:
Which of the following rays are used in doing LASIK (Laser - Assisted in Situ keratomileusis) eye surgery?
Arrange the following in the ascending order of their wavelength.
(i) Microwaves
(ii) Infrared rays
(iii) Visible rays
(iv) AM radio waves
(v) Gamma rays
(vi) X-rays
(vii) FM radio waves
