Answer:
Light wave hit a mirror and bounce off by: Reflection
You can hear around a corner by: Diffraction
If a wave hit a soft boundary by: Absorption
A pillow reduces sound by: Absorption
Light between your finger causes darkness by: Absorption
A prism makes a rainbow by: Refraction
Step-by-step explanation
Reflection: When light waves hit a mirror, they bounce off the mirror's surface, changing direction while maintaining the same angle of incidence as the angle of reflection.
Diffraction: When waves encounter obstacles or pass through narrow openings, they bend or spread out, allowing us to hear sound or see light around corners or obstacles.
Absorption: Waves, such as sound or light, are absorbed by soft or porous materials upon contact, reducing their intensity as the energy is converted into other forms, like heat.
A pillow reduces sound by absorbing the sound waves that come into contact with it, decreasing their intensity as the energy is dissipated within the pillow's material.
Light is absorbed by objects like your finger, preventing the light from passing through and causing darkness or shadow on the other side.
Refraction: When light waves pass through a prism, they change direction due to a change in speed, causing the different colors of light to separate and create a rainbow-like effect.