Final answer:
The glass amplifies sounds from the next classroom through vibrations caused by external sound waves, utilizing the concepts of resonance and natural frequency.
Step-by-step explanation:
The glass helps the student hear sounds by amplifying the sound waves. When the student places the glass against the wall, the sounds from the next classroom cause the glass to vibrate, creating an amplified version of the sounds on the other side.
This process works due to resonance and the natural frequency of the glass responding to the external sound waves. By introducing more energy to the system in the form of sound waves, the glass vibrates and these vibrations travel through the air in the glass, making it easier for the student to hear the sounds from the next classroom.