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What is the main reason for axial charom...

What is the main reason for axial charomatic aberration in the formation of image by an lens ?

Text Solution

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Form the lens maker's formula,
`(1)/(f)=(mu-1)((1)/(R_(1))-(1)/(R_(2)))`
When the lens of is kept in a liquid medium having the same refraction index, `mu=1`
In the above relation, settiong `mu=1`, we have
`(1)/(f)=0` or `f=infty`
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RESONANCE ENGLISH-GEOMATRICAL OPTICS -Exercise-3
  1. A convex mirror always produces a virtual image of real object indepen...

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  2. A converging lens of refractive index 1.5 is kept in a liquid medium h...

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  3. What is the main reason for axial charomatic aberration in the formati...

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  4. An equiconvex lens, with redii of curvature of magnitude 10 cm each, i...

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  5. Why is the ratio of the velocities of light of wavelengths 4000 Å and ...

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  6. (a) For a ray of light travelling from a denser medium of refractive ...

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  7. Derive the lens formula, (1)/(f)=(1)/(v)-(1)/(u) for a concave lens, u...

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  8. A ray of light passing through an equilateral traingular glass prism f...

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  9. (a) Draw a ray diagram showing the passage of light through a glass pr...

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  10. A glass lens of refractive index 1.5 is placed in a trough of liquid....

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  11. (a) Draw the ray diagram for the formation of image of an object by a ...

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  12. Why are convex mirrors used as side view mirrors in cars ?

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  13. Three light rays red (R), green (G) and blue (B) are incident on a rig...

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  14. The far point of a myopic person is 80 cm in front of the eye. What is...

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  15. (a) (i) Draw a labelled ray diagram to show the formation of image in ...

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  16. (a) Draw the ray diagram showing the geometry of formation of the imag...

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  17. The image obtained with a convex lens is erect and its length is 4 tim...

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  18. A converging lens is kept coaxially in contact with a diverging lens -...

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  19. Draw a ray diagram to show the working of a compound microscope. Deduc...

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  20. An astronomical telescope has an objective of focal length 20 cm and a...

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