Short answerEasy1 mark
4(ii)
A rectangular glass block of refractive index 1.5 has an air bubble trapped inside it as shown in the diagram. When seen from the surface AB, it appears to be 4 cm deep.
For which colour of light, blue or yellow, the apparent depth will be greater?
Topic: Colour dependence of apparent depth
Question wording verified against source paper
Answer
Exam answer
Yellow light.
Explanation
Yellow has a lower refractive index in glass than blue, so its apparent depth is greater.
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