Question

A glass plate is used on top of the flat plate collector in order to prevent IR radiation from coming in.

Answer 1

It is true.

A glass plate is used on top of the flat plate collector in order to prevent IR radiation from coming in.

Flat plate collector is a metal box which is used to collect solar energy in the functioning of a solar water heater.

It consists of three main parts

1. A transparent cover mage of glass or plastic called glazing.

2. Tubes which carry a coolant and  

3. dark-colored insulation plate on the bottom

Glazing (glass plate)

The glazing performs two important functions

1. Prevents IR radiation from coming in and

2. Minimizes the connective heat loss.

Hope this helps.  

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