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A roadside reflector is made of plastic. It reflects the light from car headlamps.
Figure shows part of the path of a ray of light through the reflector.
The critical angle for the plastic is less than $$45^\circ.$$
(i) On Figure, complete the path of the ray of light,
(ii) State the term used to describe this type of reflection.
(iii) Explain why the ray turns through $$90^\circ$$ at A.
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A roadside reflector is made of plastic. It reflects the light from car headlamps.
Figure shows part of the path of a ray of light through the reflector.
The critical angle for the plastic is less than $$45^\circ.$$
(i) On Figure, complete the path of the ray of light,
(ii) State the term used to describe this type of reflection.
(iii) Explain why the ray turns through $$90^\circ$$ at A.
Figure shows part of the path of a ray of light through the reflector.
The critical angle for the plastic is less than $$45^\circ.$$
(i) On Figure, complete the path of the ray of light,
(ii) State the term used to describe this type of reflection.
(iii) Explain why the ray turns through $$90^\circ$$ at A.
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He was able to look through the plastic and line up a ruler with the original light ray he drew to measure the angle of the light ray in the plastic. This angle is labeled in the drawing. The student used his drawing to determine the index of refraction for the plastic.
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