BRAINCAKEExam-style Question 3
Question
An angler standing on a river bank finds it hard to see fish in the water because of glare from the water surface. She puts on Polaroid sunglasses and can now see the fish clearly.
(a) Explain why the sunglasses reduce the glare. (3)
(b) She tilts her head sideways through 90°. State and explain what happens to the glare. (2)
(c) Suggest how she could check that the reflected light is polarised, using only her sunglasses. (1)
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Key terms in this lesson
- transmission axis
- The direction within a polarising filter along which wave oscillations are transmitted; oscillations at right angles to it are absorbed.
- brewster angle
- The angle of incidence at which reflected light is completely plane polarised, occurring when the reflected and refracted rays are perpendicular.
More in Optics
- Image Calculations
- Magnification
- Plane Polarisation
- Polarising Filters
- Polarisation by Reflection and Refraction
- Exam-style Question 1
- Exam-style Question 2
- Exam-style Question 4
All 21 lessons in Optics · All Edexcel AS-level Physics topics