Resonance 
journal of science education
July 2000, Volume 5, Number 7


1	Editorial     V	Rajaraman

3	Article-in-a-Box     A P Mitra

5	Highlights of S K Mitra's Life-Long Achievements

Inside Back Cover - Brief Life Sketch of Sisir Kumar Mitra
	
GENERAL ARTICLES
================

8	Some Aspects of Convexity - 2
	Some Applications to Optimisation Problems and to Matrices
	V S Sunder

17	Little Red Wonders - A Short Biography of the Red Blood Cell
	Avijit Hazra

28	Ionosphere and its Influence on Radio Communications
	R S Dabas

44	Radon: Not so Noble - Radon in the Environment and Associated 
	Health Problems
	Deepanjan Majumdar



CLASSROOM
=========

56	Why are we not Blinded by the Starlight?
	N Kumar

59	Teaching and Learning Genetics with Drosophila - 4 - H A 
	Ranganath and M T Tanuja

71	Project Lifescape - 8
	R J Ranjit Daniels


BOOK REVIEWS
============

86	Understanding Chemistry
	Animesh Chakravorty

88	Indian Mathematics and Astronomy: Some Landmarks
	Michio Yano


REFLECTIONS
===========

92	Professor Sisir Kumar Mitra - As I Remember Him
	Mrinal Kumar Das Gupta

INFORMATION AND ANNOUNCEMENTS
=============================

100	Institute of Radio Physics and Electronics
	P K Basu

FRONT COVER
===========

Auroral Bands
(Photo courtesy: Prof. Chanchal Uberoi, IISc, Bangalore)

BACK COVER 
===========
Sisir Kumar Mitra
(1889 - 1963)
(Illustration by Prema Iyer)