Question
Supriya, while doing an experiment in the Science Laboratory, kept a laboratory thermometer ‘P’ 10 cm away on one side of the flame of a candle. Her friend Riya kept a similar thermometer ‘Q’ 10 cm above the flame of the candle as shown in the figure. (see figure in book)
In which of the thermometers, ‘P’ or ‘Q’, the rise in temperature will be faster? Give reason for your answer.
Answer
Temperature in thermometer ‘Q’ will rise faster as it will receive more amount of heat energy because it is placed just above the candle flame. Hot air above the candle flame will raise up consequently temp. in thermometer Q will rise faster.