| Date | May 2011 | Marks available | 3 | Reference code | 11M.3.SL.TZ2.19 |
| Level | Standard level | Paper | Paper 3 | Time zone | Time zone 2 |
| Command term | Explain | Question number | 19 | Adapted from | N/A |
Question
This question is about properties of electromagnetic waves.
State two properties that are common to all electromagnetic waves.
[2]
a.
A single lens is used to form a magnified real image of an object. Explain, with reference to the dispersion of light, why the image has coloured edges.
[3]
b.
Markscheme
transverse;
can be polarized;
all have same speed in a vacuum;
a.
each colour/wavelength has different refractive index;
different focal lengths/amount of diffraction for each wavelength/colour;
so all coloured images do not overlap completely/not at same place;
b.
Examiners report
[N/A]
a.
[N/A]
b.
