You have a sealed glass jar full of air. if you put it in the freezer, what happens to the gas pressure in the jar?

The pressure of the gas inside the jar decreases, because you have
reduced the temperature of a fixed mass and fixed volume of gas.

While the pressure inside the jar decreases, the pressure outside the
jar doesn't change.  So the pressure outside becomes greater than the
pressure inside, and that's why you may see the lid of the jar sag inward,
pushed by the greater pressure on the outside.

Ray 2 should cross through the focal point on the right side of the lens