Physics, asked by verianchoudary17, 8 months ago

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Answered by silentloffer

$\huge\purple {Answer:}$

Focus is the point where light rays originating from a point on the object converge. The principal focus is defined as the point where a beam parallel to the principal axis appears to diverge converges from a point on the principal axis after passing through the lens.

$\huge\purple {principal:}$

1The principal focus of $\huge\purple {convex:}$ : mirror

A number of rays which falls parallel to the principal axis after getting reflected, the rays seems to come from a point on the principal axis. This is called as Principal focus Convex Mirror.

2.The principal focus of $\huge\purple {concave :}$ Mirror:

A number of rays which falls parallel to the principal axis on a concave mirror meets at a point on the principal axis after getting reflected. This is known as the principal focus of a concave mirror.

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Answered by opshukla9494

Explanation:

In geometrical optics, a focus, also called an image point, is point where light rays originating from the point on the object converge. Although the focus is conceptually a point, physically the focus has a spatial extent, called the blur circle.

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In geometrical optics, a focus, also called an image point, is point where light rays originating from the point on the object converge. Although the focus is conceptually a point, physically the focus has a spatial extent, called the blur circle.

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