Exam-style question
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What happens to the wavelength of light as it passes from air into water?.
- A.It increases
- B.It decreases
- C.It remains the same
- D.It doubles
Model answer
What a good answer should say
- It decreases
Explanation
Why this works
As light enters a denser medium like water, its speed decreases, leading to a decrease in wavelength while frequency remains constant. This is a fundamental principle of wave behavior at boundaries.
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