Define the principal focus of concave …

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Define the principal focus of concave mirror ??

Posted by Shubham Saxena ???? 5 years, 3 months ago

CBSE > Class 10 > Science

4 answers

Avatar ? 5 years, 3 months ago

It is a point on the principal axis at which the rays of light parallel to the principal axis meet after reflection or seem to come from. for a concave mirror the focus lies in front of the mirror .

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Himanshu Panwar 5 years, 3 months ago

On yyii Huuuy. Yyui

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Shubham Saxena ???? 5 years, 3 months ago

Thank you for answering my question. Nice but do not send the answers copied by Google . If you know this answer so you can send answer . Ok

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Yogita Ingle 5 years, 3 months ago

Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror. This point is known as the principal focus of the concave mirror.

Characteristics of image obtained by a concave mirror
There are five cases through which one can understand the characteristics of image obtained by a concave mirror and they are as follows:

Object placement	Image obtained	Image characteristics
When the object is placed at infinity	Image obtained is at the focal point	Image is a point
When the object is moved from infinity to center of curvature	Image move from focal point to center of curvature	The size of the image is increased, real, and inverted
When the object is at center of curvature	Image obtained is at center of curvature	The size of the image remains the same, real, and inverted
When the object move from center of curvature to focal point	Image move from center of curvature to infinity	The size of the image is bigger than the object, real, and inverted
When the object is at focal point	Image is at infinity	Infinitely big
When the object move from the focal point to mirror	Image move from minus infinity to mirror	The size of the image decreases, larger than the object, virtual, and upright

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