Wave - reflection

When the wave goes from one medium to another medium, some of the wave energy will be _____, some will be absorbed and some will be transmitted.

• reflected

• transferred

• conserved

• kept

When a wave pulse hits the end of the rope that is free to move (known as a free boundary), the pulse returns with no change of phase.

• True

• False

When a wave pulse hits the end of the rope that is fixed (known as a fixed boundary), the pulse returns with no change of phase.

• True

• False

When a transverse wave is reflected with 180° change of phase, a crest is reflected as a trough and a trough is reflected as a crest.

• True

• False

When the transverse wave pulse is reflected, the amplitude of the reflected wave is _____ than the original because part of the wave energy is absorbed by the new medium.

• smaller

• larger

 $\theta_1\$  is the angle of ______

• reflection

• incidence

 $\theta_2\$  is the angle of ______

• reflection

• incidence

 $\theta_2\ =\ 30^o,\ \theta_1=?$ 

•  $\ 30^o$  
  

•  $60^o$