Narrative representation of radiation.

Setting				Code of textbooks
Situation close to the heating device		Stove, man		1a, 2a, 7a
		Bulb, man		07a
Situation where the heating device is covered		Stove, plank, man		1a, 2a, 3a, 4a, 5a, 7a
		Stove, plank, thermometer, man		6a
Mean of visualization	Process	Vector	Actor	Examples of visualization	Code of textbooks
None	Implicit	Implicit	Implicit		3a, 4a, 5a, 6a, 7a, 07a
Arrow	Radial	from stove to atmosphere	Implicit		1a, 2a
Wavy line	Radial	from the surface of stove to nearby atmosphere	Implicit		7a