Types of Wave - Free MCQ Practice Test with solutions, UPSC Lucent

Mechanical waves require a medium (solid, liquid, or gas) to travel through. Examples include sound waves and seismic waves.

Electromagnetic waves, such as light and radio waves, can propagate in a vacuum without requiring a medium.

Sound waves are an example of mechanical waves as they require a medium (such as air, water, or solids) to propagate.

Mechanical waves can travel through solids, liquids, and gases. These waves require a medium to propagate, which is why they can move through various states of matter.

Electromagnetic waves consist of oscillating electric and magnetic fields and include various types of waves, such as radio waves, microwaves, and X-rays.

The speed of light in a vacuum is approximately 300,000 kilometers per second.

Radio waves have the longest wavelength among the given options.

Ultraviolet (UV) waves have shorter wavelengths compared to infrared (IR) waves.

Electromagnetic waves can undergo diffraction, which is the bending of waves around obstacles or through narrow openings.

The frequency of a wave is measured in Hertz (Hz).

Electromagnetic waves can be polarized by filtering out waves oscillating in certain directions.

Electromagnetic waves, such as light waves, can exhibit interference and diffraction phenomena.

The speed of sound waves is faster in solids compared to liquids and gases due to the closer arrangement of particles.

Reflection occurs when waves encounter a surface and bounce back, changing their direction.

The wavelength of a wave is the distance between two consecutive crests or troughs.

X-rays have higher energy compared to radio waves, visible light, and infrared waves.

Electromagnetic waves can undergo refraction when they pass through a medium of different optical density.

Gamma rays have the shortest wavelength among the given options.

The frequency and wavelength of a wave are inversely proportional. As the frequency increases, the wavelength decreases, and vice versa.

The concept of wave-particle duality is associated with both electromagnetic waves (such as light) and matter waves (such as electrons and protons). Quantum mechanics shows that light can behave both as a wave and as a particle (photon), and similarly, particles like electrons also exhibit wave-like properties. Mechanical waves, such as sound, do not show wave-particle duality.

Therefore, both options (a) and (b) are correct.