Answer :

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four different things can happen when light hits an object 
The waves can be reflected or scattered off the object. 
The waves can be absorbed by the object. 
The waves can be refracted through the object. 
The waves can pass through the object with no effect.

Explanation:

The four things that can happen to a light wave when it hits an objects are :

1. Reflection : The bouncing back of light when the light wave strikes on a surface is called reflection of light.

2. Refraction : The bending of light when the light wave moves from one medium to another.

3. Absorption : Absorption is the process in which the light wave do not reflect back. It stays inside the material.

4. Transmission : Transmission of light is the process in which light wave goes continuously straight.

Some other process that are shown by a light wave are polarization, scattering etc.

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