Answer:
Conduction
Convection
Radiation
1.
Material medium
is required.
Material medium
is required.
No material
medium is
required.
2.
It is due to
temperature
difference. Heat
flows from high
temperature
region to low
temperature
region.
It is due to
difference in
density. Heat
flows from low
density region to
high density
region.
It occurs from all
bodies at temperatures above
0 K.
3.
It occurs in
solids through
molecular
collisions,
without actual
flow of matter.
It occurs in
fluids by actual
flow of matter.
It can take place
at large distances
and does not
heat the inter-
vening medium.
4.
It is a slow
process.
It is also a slow
process.
It propagates at
the speed of
light.
5.
It does not obey
the laws of
reflection and
refraction.
It does not obey
the laws of
reflection and
refraction.
It obeys the laws
of reflection and
refraction.
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