Activity 12.5 Class 9 Science Chapter 12
Activity 12.5 Class 9 Science
belongs to Chapter 12 Sound Class 9 Science. You will get a complete
solution with an explanation and conclusion. After reading activity 12.5, you
will be able to answer the questions based on the activity.
Activity 12.5 Class 9 Science Sound
You are suggested to study NCERT activity 12.5 class 9 science
chapter 12 Sound explanation with a conclusion so that you can attempt
questions based on activity 12.5 class 9 science.
Activity 12.5 Class 9 Science
· Take
two identical pipes. You can make the pipes using chart paper. The length of the
pipes should be sufficiently long.
· Arrange
them on a table near a wall.
· Keep
a clock near the open end of one of the pipes and try to hear the sound of the
clock through the other pipe.
· Adjust
the position of the pipes so that you can best hear the sound of the clock.
· Now,
measure the angles of incidence and reflection and see the relationship between
the angles.
· Lift
the pipe on the right vertically to a small height, and observe what happens?
Observation and explanation of activity 12.5 class 9 science
When all arrangements have been done, we can hear the sound
of the clock through pipes. We observe that the sound of the clock changes with
angles.
The sound of the clock is maximum when the angle of incidence is
equal to the angle of reflection.
When we lift the pipe vertically to some height, we
can not hear the sound of the clock, because now the pipe is no longer in the
same plane of the incident sound, reflected sound, and normal.
Conclusion of activity 12.5 Class 9 Science
This activity shows that the laws of reflection are the same
for sound as they are the same for light.
Related Topics
1. Activity 12.1
2. Activity 12.4
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