Answer :
The two main reasons why a non-luminous flame is preferred for heating are:
1. Efficiency: Non-luminous flames produce more heat energy compared to luminous flames because they burn more completely due to the sufficient supply of oxygen. This complete combustion results in a higher temperature, making non-luminous flames more efficient for heating purposes.
2. Cleanliness: Non-luminous flames produce less soot and smoke compared to luminous flames. This makes them cleaner and more suitable for applications where cleanliness is important, such as in indoor heating systems or in laboratories where soot or other byproducts could contaminate experiments or equipment.
In summary, the preference for non-luminous flames for heating is mainly due to their higher efficiency in producing heat energy and their cleanliness in terms of reduced soot and smoke production.
1. Efficiency: Non-luminous flames produce more heat energy compared to luminous flames because they burn more completely due to the sufficient supply of oxygen. This complete combustion results in a higher temperature, making non-luminous flames more efficient for heating purposes.
2. Cleanliness: Non-luminous flames produce less soot and smoke compared to luminous flames. This makes them cleaner and more suitable for applications where cleanliness is important, such as in indoor heating systems or in laboratories where soot or other byproducts could contaminate experiments or equipment.
In summary, the preference for non-luminous flames for heating is mainly due to their higher efficiency in producing heat energy and their cleanliness in terms of reduced soot and smoke production.
