Make a labelled diagram of a candle flame.

In order to understand the structure of a flame, light a wax candle and watch its flame. Carefully note the different coloured zones in the flame. Starting from the base of the flame, a flame has three zones. Check the below figure and try to answer the following question Expalin why dark zone is the coldest part of a candle flame.

If a number of images of a candle flame are seen in a thick mirror, then

What makes the middle zone of a candle flame luminous (or light-giving) ?

Name the various zones of a candle flame. Which zone (or part) of a candle flame is the least hot (or coldest)?

A burning candle whose flame is 1.5 cm tall is placed at a certain distance in front of a convex lens. An image of candle flame is received on a white screen kept behind the lens. The image of flame also measures 1.5 cm. If f is the focal length of convex lens, the candle is placed.

A candle flame is held 2 meter above the water level in a tank 4 meter deep. If mu of water is 4//3 , where will the image of candle flame be seen ?