Pergamon 0360-5442(95)00026-7

Energy Vol. 20. No. 8, p. 833, 1995 Elsevier Science Ltd. Printed in Great Britain

R E P L Y

The mistake pointed out by N. D. Kaushika and M. Arulanantham is merely a typographical error. The subsequent equation and our analysis are based on the correct sign.

The second point mentioned is dependence of transmittance on incident angle. As is clear from the figures in the Comment, there is hardly any change in the results up to incident angles of 60 ° . Since the input energy is small for incident angles above 60 ° , the effect of not taking this dependence into account will be small and may be neglected.

Ramjas College University of Delhi Delhi- 110 007 India

J . P R A K A S H

833