Transparent plastic swimming-pool covers called solar heat sheets have thousands of small air-filled bubbles t?

Transparent plastic swimming-pool covers called solar heat sheets have thousands of small air-filled bubbles that resemble lenses.


The bubbles in these sheets are advertised to focus heat from the sun into the water, thereby raising its temperature.


Do you think these bublles direct more solar energy into the water? Defend your answer.Transparent plastic swimming-pool covers called solar heat sheets have thousands of small air-filled bubbles t?
The best cover would be as the one described but with a black underside which would absorb the sunlight converting it to hat which would be transferred to the water. The air bubbles do 2 things, They make the cover float and they act as a heat insulating layer preventing the heat of the water escaping. Their efficacy as a lens is doubtful.Transparent plastic swimming-pool covers called solar heat sheets have thousands of small air-filled bubbles t?
No, because the air in the bubbles has the same refractive index as the air outside.