optics has alot to do with waves

from thermodynamics to optics (light; essentially connected to waves)

reminder

ray model of light

• ray → simply intuition of light
• intuion → light propogates in a straight line

sound doesnt move matter

if the wall isnt too thick, people from another room CAN hear

if it’s air, it iwll move matter, and wont reach the other room

same applies to light

a completely dark room, a tiny soruce of light will be seen, light is a wave