A piece of ordinary glass transmits about 92% of the visible light incident on the glass. The transmittance of the glass can be increased by
A) increasing the intensity of the incident light.
B) applying an anti-reflective coating to both sides of the glass.
C) slightly tilting the glass with respect to the light beam.
D) making the glass thicker.

Question

Quizplus · Accepted Answer

Applying an anti-reflective coating to both sides of the glass can decrease the amount of light that is reflected and increase the amount that is transmitted. The other choices do not increase the transmittance of the glass. Increasing the intensity of the incident light can cause the glass to absorb more light, which may decrease transmittance. Tilting the glass may change the direction of the light, but it does not increase the amount transmitted. Making the glass thicker can also decrease transmittance by increasing absorption and reflection.

A Piece of Ordinary Glass Transmits About 92% of the Visible