Topic 1: Introduction to Waves

Introduction to Waves

A wave is a disturbance that travels through a medium or space and transfers energy from one point to another without transfer of matter.

Waves are produced due to vibrations of particles in a medium.

Examples of Waves

Waves on the surface of water
Sound waves in air
Waves produced on a stretched string

Need of a Medium

Some waves require a material medium to propagate, while some waves can travel through vacuum.

Types of Waves

Mechanical waves – require a medium
Electromagnetic waves – do not require a medium

Mechanical Waves

Mechanical waves propagate due to oscillation of particles of the medium.

Importance of Waves

Important for understanding sound and light
Used in communication systems
High conceptual weightage in MHT-CET

Main Topics Covered in This Chapter

Wave motion
Types of mechanical waves
Wave parameters
Sound waves
Speed of wave

Q1. A wave transfers:
A) Matter only
B) Energy only
C) Both matter and energy
D) Neither matter nor energy

Answer: B


Q2. Waves are produced due to:
A) Motion of medium as a whole
B) Vibration of particles
C) Heat energy
D) Electric current

Answer: B


Q3. Which of the following waves require a medium?
A) Light waves
B) X-rays
C) Sound waves
D) Radio waves

Answer: C


Q4. Waves that do not require a medium are called:
A) Mechanical waves
B) Longitudinal waves
C) Transverse waves
D) Electromagnetic waves

Answer: D


Q5. Energy is transferred in a wave without:
A) Motion
B) Medium
C) Transfer of matter
D) Vibration

Answer: C

Chapter 11: Waves

Topic 1: Introduction – Quick Revision

1. Wave

A disturbance that transfers energy without transfer of matter.

2. Cause of Waves

Produced due to vibration of particles.

3. Types of Waves

Mechanical waves – require medium
Electromagnetic waves – no medium required

4. Examples

Sound waves
Water waves
Light waves

Exam Focus (MHT-CET)

Direct MCQs are asked on definition of waves, energy transfer and types of waves.

Topic 2: Wave Motion (Imp) →