Saw right through it

Science News,  May 12, 2007  by Nathaniel L. Cohen,  P. Barry

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E. Fred Schubert and his colleagues are to be congratulated for developing an improved antireflective coating ("The New Black: A nanoscale coating reflects almost no light," SN: 3/3/07, p. 132). But the coating would not make a lens "absorb" more light. Rather, it would help the lens "propagate" the light.

NATHANIEL L. COHEN, SAN DIEGO, CALIF.

"Absorb" probably was a poor word choice in reference to a lens. The point is that the coating reduces the amount of light reflected at the lens' surface, thereby increasing the transmission of light through the lens.

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