Which of the following surfaces is most likely to reflect visible light (average…

PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

Which of the following surfaces is most likely to reflect visible light (average wavelength

\approx 550\,\text{nm}

) diffusely rather than specularly? (a) Polished steel with rms surface variation of

5\,\text{nm}

(b) Unfinished pine wood with rms surface variation of

50\,\mu\text{m}

80\,\text{nm}

(d) Frosted glass with rms surface variation of

200\,\text{nm}