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Is the focal length of a lens the same f...

Is the focal length of a lens the same for lights of all colors ?

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BINA LIBRARY-Optics-I-EXERCISE
  1. If a thin lens is dipped in water, does its focal length change?

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  2. Define principal axis of spherical mirror .

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  3. Is the focal length of a lens the same for lights of all colors ?

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  4. What is dispersion of light?

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  5. Which colour of white light suffers maximum deviation in dispersion?

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  6. Which colour of white light travels with least speed in a transparent ...

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  7. What is the nature of the final image in an astronomical telescope?

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  8. What type of lenses are used in a compound microscope?

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  9. what is optical centre?

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  10. What is the fundamental difference between a microscope and a telescop...

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  11. What is the nature of the final image in an astronomical telescope?

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  12. Why an astronomical telescope is not suitable for viewing earthly obje...

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  13. How many lenses are there in a terrestrial telescope?

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  14. By what length is the tube of a terrestrial telescope longer than the ...

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  15. Define the magnifying power of a telescope.

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  16. Define focus.

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  17. Draw a lebelled ray diagram to show the formation of image using a con...

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  18. Draw diagram to show formation of virtual image by a concave mirror.

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  19. Find an expression for the linear magnification of a real and a virtua...

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  20. Find an expression for lateral deviation.

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