The document discusses the reflection and transmission of mechanical waves. It states that when a pulse is reflected from a fixed end, it is inverted, but when reflected from a free end it is not inverted. It also notes that when a pulse travels from a less dense to a more dense medium, it is inverted, but not inverted when going from more dense to less dense. Multiple true/false questions are included to reinforce these concepts.
3. CORRECT!
When a pulse is reflected from a fixed end
it is inverted!
As the pulse reaches the end, the string
exerts an upward force on the rigid support
and the rigid support exerts an equal and
opposite force on the string
http://astarmathsandphysics.com/a-level-physics-notes/waves-and-oscillations/a-level-physics-notes-reflection-of-waves-html-
m5bffd405.gif
4. INCORRECT :(
When a pulse is reflected from a fixed end
it is inverted!
As the pulse reaches the end, the string
exerts an upward force on the rigid support
and the rigid support exerts an equal and
opposite force on the string
http://astarmathsandphysics.com/a-level-physics-notes/waves-and-oscillations/a-level-physics-notes-reflection-of-waves-html-
m5bffd405.gif
6. CORRECT!
The reflected pulse is inverted.
The blue string serves as a fixed end and
thus the reflected pulse is inverted.
http://www.physicsclassroom.com/Class/waves/u10l3a6.gif
7. INCORRECT :(
The reflected pulse is inverted.
The blue string serves as a fixed end and
thus the reflected pulse is inverted.
http://www.physicsclassroom.com/Class/waves/u10l3a6.gif
9. CORRECT!
Both the transmitted pulse and the reflected
pulse are not inverted.
The red string serves as a free end and thus,
the reflected pulse is not inverted.
http://www.physicsclassroom.com/Class/waves/u10l3a7.gif
10. INCORRECT :(
Both the transmitted pulse and the reflected
pulse are not inverted.
The red string serves as a free end and thus,
the reflected pulse is not inverted.
http://www.physicsclassroom.com/Class/waves/u10l3a7.gif
14. True/False Question
Match the incident pulse with the
correct reflected pulse (free end).
A
B
C
D
http://dev.physicslab.org/Document.aspx?doctype=5&filename=WavesSound_FixedFreeReflections.xml
17. Important Concepts
Fixed end -> pulse is inverted
Free end -> pulse is not inverted
When pulse is traveling to a different
string which is more dense, the pulse is
inverted
When pulse is traveling to a different
string which is less dense, the pulse is not
inverted