Difference between refraction of light and total internal reflection of light​

If you add up the field on the two sides of the bounday you find that whenever there is refraction there is always some reflection to balance it out. Total internal reflection only occurs when light is passing from a higher refractive index medium to a lower refractive index medium.

Explanation:

the gas collects in coils that then becomes a liquid that then flows through the coils inside the refrigerator

object 2 because all the other ones are wrong