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Interactive writing is an odd skill, one that s hard to teach. Frankly, an experienced gamer qualifies better than, say, a published novelist. That said, writing ability counts. Can this person tell a story in a compelling way Can he/she make me laugh, charm me, amaze me with their use of words I also look for their interpersonal skills. Good writers create believable characters; I think that requires an ability to connect with people, to understand them and empathize with them. Susan O Connor, Freelance Interactive Scriptwriter

The spectrum of an LED has a broad distribution of wavelength centered around a wavelength calculated from the foregoing equation. The spectral width often is specified as the full-width at half-maximum (FWHM) of the distribution. Typical values for the FWHM range from 20 to 100 nm (Figure 22.7).

Also, by this definition, hydrogen atoms connected directly to carbon atoms are not shown. So how do we know how many hydrogen atoms are connected to each carbon atom This is not a problem because we can use Rule 1. For example, where two line segments meet, we know we have a carbon atom with two covalent bonds to atoms other than hydrogen. Since Rule 1 tells us that carbon forms four covalent bonds, we know that there must be two hydrogen atoms covalently bonded to that carbon. As another example, at the end of the chain, where a single line segment comes to a point, we again use Rule 1 that each carbon has four covalent bonds. Since only one bond is shown (the last line segment), we know that the end carbon atom must have three hydrogen atoms attached. You can see this in Fig. 7-1 by comparing the skeletal formulas with the corresponding structural formula. Sometimes carbon atoms form double bonds. A double bond involves sharing two electron pairs (i.e. four electrons) in the same covalent bond between two atoms. In the structural and skeletal formula, double bonds are shown as two parallel line segments. Sometimes, but less often, carbon atoms even form triple bonds. As you might expect, a triple bond involves sharing three electron pairs (i.e., six electrons) in the same covalent bond between two atoms, and a triple bond is shown as three parallel line segments in structural and skeletal formulas. Rule 2. When counting covalent bonds for a carbon atom, double bonds count as two covalent bonds and triple bonds count as three covalent bonds. Sometimes we need to use Rule 2 in conjunction with Rule 1 to determine how many hydrogen atoms are directly connected to a carbon atom. You can see an example of this in Fig. 7-1. Notice that where there are some carbon atoms that are shown to have a double bond on one side and a single bond on the other side. That makes three covalent bonds shown for each of those carbon atoms. Since each carbon atom must have four covalent bonds, we know that those particular carbon atoms each have only one hydrogen atom directly attached.