Gambar rajah menunjukkan muka gelombang satah ditujukan ke pemantul satah.
Which statement is correct about the reflected and incident waves?
Penyataan yang manakah betul tentang gelombang pantulan dan gelombang tuju?
A The speed of the reflected waves is the same as the speed of the incident waves.
B The wavelength of the reflected waves is shorted than that of the incident waves.
C The frequency of the reflected waves is lower than of the incident waves.
D The direction of reflected waves are always at right angels to the incident waves.
State the laws of reflection:
1.angle of incidence=angle of reflection
2.The incidence ray, the reflected ray and the normal lie in the same plane.
Characteristics of reflected waves:
Angle
of reflection
|
Equal
to angle of reflection
|
Wavelength
|
unchanged
|
Frequency
|
unchanged
|
Speed
|
unchanged
|
Direction
|
changed
|
Answer: A