A parallel beam of light is to be obtained from the headlamp ofa car. At which of the following positions should the source of light be placed from the pole...

Answer Details

In order to obtain a parallel beam of light from the headlamp of a car using a spherical mirror, the light source should be placed at the focal point of the mirror. This is because a spherical mirror can converge or diverge the light rays depending on where the light source is placed relative to the mirror. If the light source is placed at the focal point of the mirror, the light rays will be reflected in parallel to each other, creating a parallel beam of light. Placing the light source at any other position, such as the centre of curvature, beyond the centre of curvature, or between the focal point and the pole, will cause the light rays to converge or diverge, creating a beam of light that is not parallel. Therefore, the correct option is "At the focal point".