Concept explainers
What is meant by the idea that a surface may be polished for some waves and rough for others?
To Explain: Some surface may be polished for some waves and rough for others.
Answer to Problem 9A
The surface is considered polished if its irregularities are less than the 1/8l of the incident wave.
Explanation of Solution
Introduction:
Every surface has some irregularities.More the irregularities, the surface is said to be rougher.
The surface with negligible irregularities is considered a polished surface. As the irregularities increase, the surface becomes rough. If the irregularities are more than one eighth of the incident wavelength, then the surface will be considered as irregularotherwise it is considered polished.
Conclusion:
The smooth or polished surface has fewer irregularities and its value is less than
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