Question

A non-reflective coating like the one described in Example 27.6 works ideally for a single wavelength and for perpendicular incidence. What happens for other wavelengths and other incident directions? Be specific.

a) Coating works well for all wavelengths and incident angles.

b) Coating is less effective for other wavelengths and angles.

c) Coating is ineffective for all wavelengths and angles.

d) Coating works well for other wavelengths but not other angles.

Answer 1

A non-reflective coating, like the one described in Example 27.6, works ideally for a single wavelength and perpendicular incidence. However, it is less effective for other wavelengths and angles.

Step-by-step explanation:

A non-reflective coating, such as the one described in Example 27.6, works ideally for a single wavelength and for perpendicular incidence. However, for other wavelengths and incident directions, the coating is less effective. It will only partially cancel out the other wavelengths, resulting in partial reflection. Therefore, option B is the correct answer - the coating is less effective for other wavelengths and angles.