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# P8 light homework help

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Some IGCSE light questions with clues

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### P8 light homework help

1. 1. This is about lateral inversion.• Where does the image appear to come from?• Extend the rays from the point of intersection and where does do they originate from?• What do you notice about the distance of the object and the image?
2. 2. Image of girl You must draw out a diagram!To start with the girl is 5 metres away from the mirror– how far away is she from from her image?
3. 3. Draw the normal for this ray!How manydegrees arethere in atriangle?
4. 4. Angle of i = angle of r You must draw out a60º 60º diagram! Work out this angle beacuse you know how many degrees are in a triangle, draw the normal at 90º and…. 45º ?º
5. 5. What is the angle of reflection?Where is the angle of reflection?
6. 6. Is this a trick question? Where is the normal?
7. 7. Dispersion
8. 8. Total internalreflectionWhere is thenormal? Think about the critical angle?