Question

Parabolic mirror are used in search light but not spherical mirror why?

Answer 1

Answer:

In case of parabolic mirror , when source is at the focus , beam of light produced over the entire cross-section of the mirror is a parallel beam . So that the object located at far distance can be visualized clearly.

Explanation:

Answer 2

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Parabolic mirror are used in search light but not spherical mirror why?

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Due to large aperture of mirror , marginal rays give a divergent beam . But in case of parabolic mirror , when source is at the focus , beam of light produced over the entire cross-section of the mirror is a parallel beam .