| Date | May 2015 | Marks available | 1 | Reference code | 15M.3.sl.TZ1.1 |
| Level | SL | Paper | 3 | Time zone | TZ1 |
| Command term | State | Question number | 1 | Adapted from | N/A |
Question
Electromagnetic waves can transfer energy and carry information.
State the relationship between the energy of a wave and its wavelength.
Markscheme
\(E = \frac{{hc}}{\lambda }/E = \alpha \frac{1}{\lambda }\) / energy inversely proportional to wavelength / the higher the energy the shorter the wavelength / OWTTE;
Do not accept \(E = h\upsilon /hf\).
Examiners report
Most students scored the mark but only a few of them stated the quantitative relationship (inverse proportionality).
Syllabus sections
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