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Radiations sensed by eyes

Arun Asked:
“What form of radiation can your eyes detect? sir, please answer this question”
Answer:
Normal Human Eyes can sense the visible spectrum only.

“The visible spectrum is the portion of the electromagnetic spectrum that is visibleto (can be detected by) the human eye. Electromagnetic radiation in this range ofwavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 390 to 750 nm.[1] In terms of frequency, this corresponds to a band in the vicinity of 400–790 THz.” ———– Wikipedia

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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