Q1. In page 58, the book says we can use ultrasound to produce imags inside the body.
In an MRI we use Magnetic waves to look inside the body. Explain how this thing would work.
Q2. Look at page 63 and state how the recorded grooves differ at different pitches or loudness of sound
Q3. Do the experiment discribed in 73p. State what you thought after the experiment.
To be answered by 2/17 after reading chap2.4 and 3.1(58~78p).
1. Doctors send ultrasound into our body and then machines record the waves that are reflected from inside the body. Information from these echoes forms a picture on a screen. The image allow as to find out if their internal organs are working well or not.
2. The sound waves are made when they hit the grooves. If the grooves are placed more frequently the pitch of the sound will be high. And if the shape and size of the grooves changes, the loudness will change.
3.The electromagnetic wave that the remote control shoots will hit the mirror, and the wave will be reflected by the mirror and hit the TV. If you shoot it at the right angle, the same thing that happen when you shoot it straight at the TV will happen.