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A converging lens of focal length 20cm i...

A converging lens of focal length 20cm is separated 8 cm from a diverging lens of focal length 30 cm. A parallel beam of light falls on converging lens and after passing through diverging lens focussed at point P. Find the location of point P. Repeat the calculation for the case when the parallel beam first falls on diverging lens.
[4.2 cm from convex lens]

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PHYSICS GALAXY - ASHISH ARORA-GEOMETRICAL OPTICS-Practive Exercise 5.6
  1. A point source of light is kept at a distance of 15cm from a convergi...

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  2. A 5.0 diopter lens forms a virtual image which is 4 times the object p...

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  3. A point object is placed at a distance of 25 cm from a convex lens of ...

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  4. A convex lens of focal length 20 cm and a concave lens of focal length...

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  5. A convex lens of focal length 20cm is placed 10cm in front of a convex...

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  6. A converging lens of focal length 20cm is separated 8 cm from a diverg...

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  7. Two symmetric double convex lenses A and B have same focal length but ...

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  8. An object is placed at 20 cm left of the convex lens of focal length 1...

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  9. In the figure- it is shown,the focal length f of the two thin convex l...

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  10. A convex lens of focal length 10cm is placed 30 cm in front of a secon...

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  11. A small pin of size 5 mm is placed along principal axis of a convex le...

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  12. An object is kept at a distance of 16 cm from a thin lens and the imag...

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  13. An object is placed midway between the lens and the mirror as shown in...

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  14. Two thin convex lenses of focal lengths f(1) and f(2) are separated by...

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  15. A convex lens of focal length 15 cm and a concave mirror of focal leng...

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  16. A convex lens of focal length 15 cm is placed in front of a convex mir...

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