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Find the focal length of the lens shown ...

Find the focal length of the lens shown in the Fig..

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`:' (1)/(f) = (n_(net) - 1) ((1)/(R_(1)) - (1)/(R_(2)))`
`rArr (1)/(f) = (3//2-1) ((1)/(10) - (1)/((-10))) rArr (1)/(f) = (1)/(2) xx (2)/(10) rArr f = + 10cm`
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RESONANCE ENGLISH-GEOMATRICAL OPTICS -Advance level Problems
  1. Find the focal length of the lens shown in the Fig..

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  2. A U-shaped wire is placed before a concave having radius of curvature ...

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  3. A paperweight in the form of a hemisphere of radius 3.0 cm is used to ...

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  5. Two media each of refractive index 1.5 with plane parallel boundaries ...

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  14. A beam of parallel rays of diameter 'b' propagates in glass at an angl...

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  15. A small ball is thrown from the edge of one bank of a river of width 1...

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  16. Two concave mirrors each of focal length 'f' are placed infront of eac...

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  17. An observer observer a fish moving upwards in a cylindrical container ...

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  18. The figure shows the square face (of side 'a') of a transparent cuboid...

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  19. An insect at point 'P' sees its two images in the water mirror system ...

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  20. A ray of light is incident on a surface in a direction given by vector...

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  21. If an observer sees the bottom of the vessel shown in Figure., at 8cm,...

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