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Why are mirror is uded in search ligths ...

Why are mirror is uded in search ligths parabolic and not concave spherical?

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MODERN PUBLICATION-REFLECTION OF LIGHT-EXERCISE
  1. Why are mirror is uded in search ligths parabolic and not concave sphe...

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  2. State the characteristis of image formed by a plane mirror.

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  3. Image formed by a plane mirror is

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  4. Define focus, focal length and aperture of a spherical mirror.

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  5. Show that for a spherical concave mirror f=R/2.

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  6. Show that the focal length of a conave spherical mirror is half of the...

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  7. Show that the focal length of a spherical miror is half the radius of ...

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  8. Derive mirror formula for concave mirror stating assumptions?

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  9. Derive mirror formula for a convex mirror.

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  10. Derive mirror formula for concave mirror stating assumptions?

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  11. Derive mirror formula for a convex mirror.

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  12. By stating sign conventions and assumptions made,derive mirror formula...

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  13. Derive mirror formula for a convex mirror.

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  14. Derive mirror formula for a convex mirror.

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  15. By stating the sign conventions and assumptions used, derive the relat...

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  16. Define focal length and radius of curvature of a spherical mirror.Ded...

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  17. Derive mirror formula for a convex mirror.

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  18. By giving sign-conventions, derive the lens formula relating object di...

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  19. Define magnification of spherical mirror. What is the magnification pr...

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  20. Draw a ray diagram to show the image formation by a concave mirror, wh...

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  21. Write expression for the magnification produced by a lens system.

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