Why is the apparatus left for 15 minutes at each new light intensity before starting measurements

The apparatus is the instrument to perform various experiments in the lab. The apparatus is usually made up of glass.

These are the following apparatus used in the lab:-

Apparatus left for 15 minutes at each new light intensity before starting measurements to sterilize and make it pure and get the error-free readings.

Different light intensities are sensitive to the various bacteria and help to kill them.

For more information, refer to the link:-

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well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.