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What is the shape of the wavelength in c...

What is the shape of the wavelength in case
Light emerging out of a convex lens when a point source is placed at its focus.

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The wavefront from a point source will be spherical and diverging in nature . When it passes from the convex lens, then due to refrection from the lens, the wavefront will be plane.
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MODERN PUBLICATION-WAVE OPTICAL-Revision Exercises (Very Short Answer Questions)
  1. What will be the nature of the wavefront of light emitted from a line ...

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  2. What is the phase difference between any two points on a spherical wav...

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  3. What is the shape of the wavelength in case Light emerging out of a...

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  4. What is sustained interference ? Write necessary conditions for it.

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  5. What are coherent sources?

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  6. State two conditions to obtain sustained interference of light. In you...

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  7. What are coherent sources of light ? Why are coherent sources required...

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  8. What is diffraction of light?

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  9. The refractive index of plastic is sqrt(3). Calculate the angle of ref...

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  10. State Huygens' principle of diffraction of light.

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  11. What happens to interference fringes when the distance between the two...

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  12. If one of the slits in Young's experiment is covered, what effect will...

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  13. Write the relationship between the path difference and the wavelength ...

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  14. What is the condition of obtaining bright interference fringes?

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  15. If you move the source slit closer to the double slit in Young's exper...

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  16. Will there be an interference pattern on the screen if the slits in Yo...

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  17. Distinguish between interference and diffraction of light.

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  18. Three lights of red, blue and green colour are used successively in Yo...

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  19. What wil be the effect on the fringes, if Young's double slit experime...

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  20. What will be the ratio of slit widths if the amplitudes of the light w...

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