The invention of laser and its demonstration in 1960 by Theodore Maiman had enabled the scientists to tread in a numerous hitherto untrodden paths of which two important ones are Fiber Optics in 1960 and Nonlinear Optics in 1961.
Update Study Group (erstwhile ‘Update’) began publication from Kolkata, India in 1999. From the very beginning, ‘Update’ stood for international socialist movement and Marxist world outlook. ।
