Question

which type of trsnsmission of heat is a hand and a fire

Answer 1

Since air is a poor thermal conductor, you won't receive much heat from the campfire via conduction unless you stick your hand in the fire. ... The thermal radiation from the fire spreads out in all directions and is able to reach you. This thermal radiation is mostly in the form of infrared waves and visible light.

Answer 2

Explanation:

There are three types of Heat transfer -

- Conduction

- Convection &

- Radiation

- Conduction 

Heat transfer takes place by direct contact of particles.

e.g. ⇒ When you touches hot coffee mug your hand heats up.

       ⇒ When we place one end of an iron rod in fire, other end also heats up. 

- Convection  

Heat transfer takes place through a medium which may be liquid or gas.

e.g. ⇒ Heating a pot of water on a stove. 

When stove is turned on heat is transferred first by conduction between the stove through the bottom of the pot to the water. 

Heat transfer from the hot water at the bottom to the cooler water at the top is by convection. 

 

- Radiation

Heat transfer takes place through empty space.

e.g. ⇒ Transfer of heat from the Sun to the Earth's atmosphere.

       ⇒ When a person place their cold hands over fire.