Lakhmir Singh Class 9 Physics Solutions Chapter 5 - Sound - Free PDF Download
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The fifth chapter ‘Sound’ incorporates a wide record of sound waves, their creation, and their propagation. Sound energy is the type of energy on account of which we can hear. It goes as longitudinal waves where the particles of the medium vibrate in a uni-course where the waves are moving. Other examples of longitudinal waves are the water waves formed on the water surface in a lake or the waves that move alongside a spring when it is pushed toward one side.
The chapter further explains the connection between speed, recurrence, and frequency of a wave. For instance, the vibration of two vocal strings in our throat or the vibration of a drum membrane delivers a sound that propagates through the layers of air and arrives at our ear. Sound waves are mechanical waves since they require a material mode for their propagation. Sound waves can't go through the vacuum or free space. Hence the astronauts convey through remote sets using radio waves on the outer surface of the moon.
This chapter teaches different uses of ultrasound in various fields and the idea of Sonar. The attributes of sound include loudness, pitch, and quality. Development of the human ear and its working are the concluding concepts of the chapter.
Topics covered in the Chapter
What are the sound waves?
How sound is produced?
Does sound travel?
What sources does sound use to travel?
What is the wavelength and what causes it?
Laws of Reflection of sound
What is reverberation?
What is compression?
All about the intensity of sound
Types of sound waves
Vedantu’s Lakhmir Singh Class 9 Physics Solutions for Chapter 5 is a truly essential study material that students must make use of. From detailed explanations to excellent questions - it has everything a student requires to ace their performance in the subject.
FAQs on Lakhmir Singh Physics Class 9 Solutions Chapter 5 - Sound
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The chapters in Lakhmir Singh's Solutions depend on the CBSE board. The reason why students select Lakhmir Singh answers is that the points are clarified with the help of models and problems which allow them the opportunity to practice and apply the formulas. The whole textbook is divided into sets like the explanation of the chapters, practice questions, and multiple-choice questions toward the end of every section. These aspects make Lakhmir Singh’s books more useful and reliable for students.
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4. What sets of questions are available in Lakhmir Singh textbooks to explain Class 9 Physics?
Different sets of questions are provided for students to understand the concepts and then solve them. A few sets of questions include filling in the blanks, answering in one word. These are the basic sets. The average set includes solutions, numerical and short answers. However, there are more advanced level questions that ask students to explain a particular situation, solve the formulas, explain the terminologies and write detailed answers. There are also a few questions that ask to provide brief answers or explanations for the topics.
5. What does chapter 5- Sound of Physics Class 9 explain?
Concepts covered in Chapter 5 of Physics Class 9 are all related to Sound. It starts by explaining the Characteristics of a Sound Wave, Echoes, Human Ear and Production of Sound. Later on, the chapter teaches the topics and importance of Propagation of Sound, Range of Hearing in Humans, Reflection of Sound, Reverberation. Some other concepts are SONAR, Sound, Sound Need a Medium to Travel, Sound (Numerical) and Speed of Sound (Velocity of Sound). In the end, the chapter is explaining what ultrasound is and its importance.