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Graphene bubbles can help make auto focus lenses

graphene
GRAPHENE

A group of UK Physicists claim that they have developed graphene bubbles which can change its curvature and hence its focal length and power by applying small voltages. If developed, this can be used in mobile cameras and other such devices. This would better imitate the functioning of Human Eye too.

More details available at http://physicsworld.com/cws/article/news/47250

PowerPoint Based Lessons for Class X Physics

Electricitiy

Human_Eye

MAGNETIC_EFFECT_OF_CURRENT_1

Light_Reflection

Light_Refraction

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