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Search-lights and vehicle headlights get powerful parallel beams of light by using
- a)Convex mirrors
- b)Polar mirrors
- c)Bifocal mirrors
- d)Concave mirrors
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Search-lights and vehicle headlights get powerful parallel beams of li...
A ray passing through the principal focus of a concave mirror or a ray which is directed towards the principal focus of a convex mirror, after reflection, will emerge parallel to the principal axis.
So, concave mirrors are commonly used in torches, search-lights and vehicles headlights to get powerful parallel beams of light. They are often used as shaving mirrors to see a larger image of the face. The dentists use concave mirrors to see large images of the teeth of patients.
Large concave mirrors are used to concentrate sunlight to produce heat in solar furnaces.
Most Upvoted Answer
Search-lights and vehicle headlights get powerful parallel beams of li...
Concave mirrors are used in searchlights and vehicle headlights to create powerful parallel beams of light. This is due to the unique reflective properties of concave mirrors.
Explanation:
1. Concave mirrors: Concave mirrors have a reflective surface that is curved inwards, resembling the shape of a cave. The inner surface of the mirror is reflective, while the outer surface is transparent.
2. Reflective properties: When light rays strike a concave mirror, they are reflected inwards and converge at a specific point known as the focal point. This focal point is located along the principal axis of the mirror.
3. Parallel beams of light: By placing a light source at the focal point of a concave mirror, the reflected rays of light form a parallel beam. This is because all the reflected rays are directed towards the same point, resulting in a concentrated, powerful beam of light. The parallel beam is ideal for applications such as searchlights and vehicle headlights, where a strong, focused beam is needed.
4. Searchlights: Searchlights are used to project a powerful beam of light over long distances. By using a concave mirror, the light source is positioned at the focal point, and the reflected rays create a parallel beam that can be directed in a specific direction. This allows the searchlight to illuminate a targeted area with a concentrated beam of light.
5. Vehicle headlights: Vehicle headlights also use concave mirrors to produce parallel beams of light. The light source, typically a bulb or LED, is placed at the focal point of the mirror. The reflected rays form a parallel beam that is directed forward, allowing the headlights to effectively light up the road ahead.
6. Advantages of concave mirrors: The use of concave mirrors in searchlights and vehicle headlights provides several advantages. It allows for the creation of powerful, parallel beams of light that can be directed in a specific direction. The concentrated beam improves visibility and illumination, making it safer for drivers and aiding in search and rescue operations.
In conclusion, concave mirrors are used in searchlights and vehicle headlights to create powerful parallel beams of light. The unique reflective properties of concave mirrors allow for the convergence of light rays at a focal point, resulting in a concentrated beam that can be directed in a specific direction.
Explanation:
1. Concave mirrors: Concave mirrors have a reflective surface that is curved inwards, resembling the shape of a cave. The inner surface of the mirror is reflective, while the outer surface is transparent.
2. Reflective properties: When light rays strike a concave mirror, they are reflected inwards and converge at a specific point known as the focal point. This focal point is located along the principal axis of the mirror.
3. Parallel beams of light: By placing a light source at the focal point of a concave mirror, the reflected rays of light form a parallel beam. This is because all the reflected rays are directed towards the same point, resulting in a concentrated, powerful beam of light. The parallel beam is ideal for applications such as searchlights and vehicle headlights, where a strong, focused beam is needed.
4. Searchlights: Searchlights are used to project a powerful beam of light over long distances. By using a concave mirror, the light source is positioned at the focal point, and the reflected rays create a parallel beam that can be directed in a specific direction. This allows the searchlight to illuminate a targeted area with a concentrated beam of light.
5. Vehicle headlights: Vehicle headlights also use concave mirrors to produce parallel beams of light. The light source, typically a bulb or LED, is placed at the focal point of the mirror. The reflected rays form a parallel beam that is directed forward, allowing the headlights to effectively light up the road ahead.
6. Advantages of concave mirrors: The use of concave mirrors in searchlights and vehicle headlights provides several advantages. It allows for the creation of powerful, parallel beams of light that can be directed in a specific direction. The concentrated beam improves visibility and illumination, making it safer for drivers and aiding in search and rescue operations.
In conclusion, concave mirrors are used in searchlights and vehicle headlights to create powerful parallel beams of light. The unique reflective properties of concave mirrors allow for the convergence of light rays at a focal point, resulting in a concentrated beam that can be directed in a specific direction.
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Search-lights and vehicle headlights get powerful parallel beams of light by usinga)Convex mirrorsb)Polar mirrorsc)Bifocal mirrorsd)Concave mirrorsCorrect answer is option 'D'. Can you explain this answer?
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