from an insight of the characterization of a light source as a system transforming
energy. Flame test is a content that teachers believe important to be addressed, even
if in different moment during the proposal. Composite nature of white light is
another of the topic that teachers consider important to be addressed, not immediately, but after clarifying that light is an entity carrying energy rather than an
electromagnetic radiation and/or the discussion on the energetic nature of colors,
which is another topic mainly included in the initial phase, as the characterization of
Fig. 14.2 For every addressed topic (vertical axes) it is possible to observe the number of teachers
who included it in the project (horizontal axes) and its position in the sequence of the educational
proposals, according to the color code (or the equivalent numbers). For example, topic A2 is
included by seven teachers: three of them placed it in first position, three placed it in second position
and only one teacher placed it in the third position. Here we report the most significant contents: (a)
Light sources. (b) Characteristics of the emitted light. (g) Interpretation of discrete spectra. (f)
Spectra. (e) Formal constructs, laws, principles
14 IDIFO6 MQ_P: A Course for In-Service Secondary School Teachers Education on. . . 183
energy. Flame test is a content that teachers believe important to be addressed, even
if in different moment during the proposal. Composite nature of white light is
another of the topic that teachers consider important to be addressed, not immediately, but after clarifying that light is an entity carrying energy rather than an
electromagnetic radiation and/or the discussion on the energetic nature of colors,
which is another topic mainly included in the initial phase, as the characterization of
Fig. 14.2 For every addressed topic (vertical axes) it is possible to observe the number of teachers
who included it in the project (horizontal axes) and its position in the sequence of the educational
proposals, according to the color code (or the equivalent numbers). For example, topic A2 is
included by seven teachers: three of them placed it in first position, three placed it in second position
and only one teacher placed it in the third position. Here we report the most significant contents: (a)
Light sources. (b) Characteristics of the emitted light. (g) Interpretation of discrete spectra. (f)
Spectra. (e) Formal constructs, laws, principles
14 IDIFO6 MQ_P: A Course for In-Service Secondary School Teachers Education on. . . 183