PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
A small iron sphere glows dull red when heated. To make its glow appear bluish-white, which one of the following actions should be taken?
(a) Reduce its temperature slightly
(b) Maintain the same temperature but polish its surface to a mirror finish
(c) Raise its temperature to a much higher value
(d) Keep its temperature constant and enclose it with highly reflecting mirrors