Luminous and Non Luminous Flame

What are the characteristics of a luminous flame?

• Yellow color and presence of unburned carbon particles

• Green color and presence of unburned carbon particles

• Blue color and absence of unburned carbon particles

• Red color and presence of unburned carbon particles

Explain the difference between a luminous and non luminous flame.

• A luminous flame produces smoke, while a non-luminous flame does not.

• A luminous flame produces light, while a non-luminous flame does not.

• A luminous flame is transparent, while a non-luminous flame is opaque.

• A luminous flame is cold, while a non-luminous flame is hot.

What causes a flame to be luminous?

• Absence of any particles emitting light

• Presence of hot particles emitting light

• Presence of water vapor emitting light

• Presence of cold particles emitting light

How can you identify a non luminous flame?

• By its green color and lack of visible light

• By its blue color and lack of visible light

• By its red color and visible light

• By its yellow color and lack of visible light

What is the color of a luminous flame?

• Red

• Green

• Purple

• Blue or yellow

Why does a non luminous flame not produce light?

• Non luminous flames do not reach a high enough temperature to produce light.

• Non luminous flames are not made of the right materials to produce light

• Non luminous flames are too bright to produce light

• Non luminous flames are too small to produce light

What type of fuel produces a luminous flame?

• Solid fuel

• Incomplete combustion fuel

• Electric fuel

• Complete combustion fuel

Describe the appearance of a non luminous flame.

• Green in color

• Yellow in color

• Red in color

• Blue in color

What is the temperature range of a luminous flame?

• 1000-1200°C

• 500-700°C

• 1500-1800°C

• 200-400°C

Why is it important to distinguish between luminous and non luminous flames?

• They are both the same in terms of properties and applications

• It doesn't matter, they can be used interchangeably

• It's not important, as they both produce heat and light

• They have different properties and applications.