When an object is at the focus of a concave mirror, then the image will be formed at ____.

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Detailed Solution

When the object is at the focus of the concave mirror, the image will be formed at infinity.
The rays taken into consideration here are one that passes through the centre of the concave mirror and one that is parallel to the main axis. This forms a highly magnified, realistic, and reversed picture at infinity.
Light rays parallel to the primary axis of a concave lens depart from its focal point and are refracted. It is known as the Concave or Diverging lens because of its function. A concave lens allows incident light to flow through it and diverge in a direction parallel to its main axis. It passes through the emphasis when generalised. Any light beam that strikes a glossy, flat surface bounces back.
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