Reflection of sound wave: Like light, sound can also be made to change its direction and bounce back when it falls on a hard surface. The bouncing back of sound when it strikes a hard surface is known as reflection of sound. The reflection of sound does not require a smooth and shining surface like that of mirror, it can be reflected from any surface whether it is smooth or rough. Sound is reflected in the same way as light and follows the same laws of reflection, which are as follows:
1. The incident sound wave (AO), the reflected sound wave (OB) and the normal (ON) at the point of incidence, all lie in the same plane.
2. The angle of incidence (<AON) of sound is equal to the angle of reflection (<NOB) of sound.
Application of reflection of sound:
A wave of frequency 100 Hz is sent along a string towards a fixed end. When this wave travels back after reflection, a node is formed at a distance of 10 cm from the fixed end of the string. The speeds of incident (and reflected) waves are | |||
Right Option : C | |||
View Explanation |
Which one of the following material will reflect sound better ? | |||
Right Option : C | |||
View Explanation |
The direction of an incident sound makes an angke of with the normal of a reflecting surface. The reflected sound makes an angle of _____ with the normal . | |||
Right Option : B | |||
View Explanation |
Abhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
My experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Being a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Abhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
I have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
A marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
One of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
It has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice