Yuvaplus Light 3

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LIGHT Part 3
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Welcome to West Bengals 1st Learning Mate
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Refraction of light through a lens Lens which
converge a parallel beam of rays to a point are
said to be convergent in nature and those which
diverge the rays from a virtual point are said to
be divergent in nature. Generally, convex lens
are convergent and concave lenses are divergent
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Terms related to lens Optical center It is a
mid point in a lens and any ray which passes
through it does not deviate Focus The point at
which the light rays coming parallel to the
principal axis meet or appear to meet after
refraction is called focus Focal length The
distance between the optical centre and the focus
is called focal length
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Image formation by Convex lens
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Image formation by Concave lens
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