If we light a torch then diverging beam of light are produced. But we use concave mirror in the torch to attain parallel beam of light. So what is the connection between this?

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Ajay Rajak

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Concave mirror is use to get focused and long distant parrallel light and this ia an application of concave mirror. As above diagram you can see the passage of parallel light comming out after reflection ,in a critical sense it can be said that law of reflection is the connection between this.
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Concave mirror is use to get focused and long distant parrallel light and this ia an application of concave mirror. As above diagram you can see the passage of parallel light comming out after reflection ,in a critical sense it can be said that law of reflection is the connection between this. read less
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The concave mirror is used to throw the light to the maximum possible distance in a torch the bulb is placed at the focus of a concave mirror and in the light approaches the concave mirror it reflects all the light make the parallel beam of light RayIf we use any other mirror instead of the concave...
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The concave mirror is used to throw the light to the maximum possible distance in a torch the bulb is placed at the focus of a concave mirror and in the light approaches the concave mirror it reflects all the light make the parallel beam of light RayIf we use any other mirror instead of the concave mirror we could not get that circling effect of light beams. read less
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The source of light in the torch is placed at the focus of the concave mirror which after reflecting produces straight beam of light.
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The source of light in the torch is placed at the focus of the concave mirror which after reflecting produces straight beam of light.
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According to laws of if reflection if we put source on focus it becomes parallel to the line pass through centre of mirror and centre of curvature. It is the concept we use in torch.
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Tutor

Due to diffraction of light.
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(Ex Aakash, Resonance and extramarks )Physics faculty with 5 years experience

Because if a bulb is placed at the focus of the concave mirror, then the rays after reflection become parallel and we get the parallel beam of light.
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When an object/source of light is places at the focus of concave mirror it reflects and makes the mean of light parallel to the principal axis.
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The concave mirror helps the diverging light beams to become parallel and travel a longer distance.
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It is true, when we light torch diverging beam of light is produced. But the bulb is placed at the focus of concave mirror. In this situation all divergent rays of light are reflected from the concave surface and after reflection they are parallel.
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