Which kind of mirrors are used in the headlights of a motorcar and why?
Download our app for free and get started
Concave mirrors are used in headlights of car. The position of the is placed nearer to the focus of the concave. The reason is that the main purpose of the head lights is to focus or show the light for larger area as much as possible and to send a beam of light infront of the car. Because light from a source comes in all directions (diffration) and in case of head lights we don't want to face the light towards us. And we want to change the direction of those rays which are coming to us to travel along the road. This problem is solved by placing light source or bulb at the focus of the concave mirror because the light rays coming from focus towards the mirror after reflection goes parallel to principal axis or along the road.
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1View SolutionIf a ray of light is incident on a plane mirror such that it makes an angle of 30with the mirror, then will be the angle of reflection?
- 2View SolutionDraw a ray diagram to show the path of the reflected ray corresponding to an incident ray which is directed towards the principal focus of a convex. mirror. Mark on it the angle of incidence and the angle of reflection.
- 3View SolutionExplain with the help of a diagram, why the convex lens is also called a converging lens.
- 4View SolutionA doctor has prescribed a corrective lens of power, -1.5D. Find the focal length of the lens. Is the prescribed lens diverging or converging?
- 5View SolutionWhat is meant by:
Draw diagram to show the action of convex mirror on a beam of parallel light rays. Mark on this diagram principal axis, focus F, centre of curvature C, pole P and focal length ƒ, of the convex mirror. - 6View SolutionYour eye contains a convex lens. Why is it unwise to look at the sun?
- 7View SolutionIf a ray of light enters from alcohol to air. The refractive index of alcohol is 1.36. Calculate the speed of light in alcohol with respect to air.
- 8View SolutionA convex mirror used as a rear-view mirror in a car has a radius of curvature of 3m. If a bus is located at a distance of 5m from this mirror, find the position of image. What is the nature of the image?
- 9View SolutionIt is desired to obtain an erect image of an object, using concave mirror of focal length of 12cm.
Will the image be smaller or larger than the object? Draw ray diagram to show the formation of image in this case. - 10View SolutionExplain with the help of a diagram, why the concave lens is also called a diverging lens.