A piece of blue glass heated to a high temperature and a piece of red glass at room temperature, are taken inside a dimly lit room, then

Options

A. the blue piece will look blue and red will look as usual
B. red look brighter red and blue look ordinary blue
C. blue shines like brighter red compared to the red piece
D. both the pieces will look equally red.

Answer

c

Explanation

According to the Stefan.s law, the total energy emitted per second by a unit area of a black body is proportional to the fourth power of its absolute temperature. Thus blue glass is at high temperature than red glass therefore it shines brighter than red glass.