Question:medium
A plane wavefront of width ' \( x \) ' is incident on an air-water interface and the corresponding refracted wavefront has a width ' \( y \) ' as shown in figure. The refractive index of air with respect to water in terms of distances ' \( w \) ' and ' \( z \) ' is (AD = w, CB = z)
A plane wavefront of width ' \( x \) ' is incident on an air-water interface and the corresponding refracted wavefront has a width ' \( y \) ' as shown in figure. The refractive index of air with respect to water in terms of distances ' \( w \) ' and ' \( z \) ' is (AD = w, CB = z)
Show Hint
- Refractive index = ratio of velocities
- Use geometry of wavefront (triangle relations)
Updated On: May 4, 2026
- \( \frac{w}{z} \)
- \( \frac{z}{w} \)
- \( \sqrt{\frac{w}{z}} \)
- \( \sqrt{\frac{z}{w}} \)
Show Solution
The Correct Option is B
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