Class 10 Exam > Class 10 Questions > In torches, search lights and headlights of v...
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In torches, search lights and headlights of vehicles, the bulb is placed
- a)Very near to the focus of the reflector
- b)Between the pole and the focus of the reflector
- c)At the centre of curvature of the reflector
- d)Between the focus and centre of curvature of the reflector
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
In torches, search lights and headlights of vehicles, the bulb is plac...
Torches, search lights, and headlights of vehicles
In torches, search lights, and headlights of vehicles, the bulb is placed very near to the focus of the reflector. This positioning ensures that the light rays from the bulb are reflected in a parallel manner, resulting in a focused and powerful beam of light.
Explanation:
1. Purpose of the reflector:
- The reflector in torches, search lights, and headlights of vehicles is used to control and direct the light emitted by the bulb.
- It is designed to reflect the light rays in a specific direction, increasing the intensity and reach of the light beam.
2. Reflectors and light rays:
- When light rays from the bulb fall on the reflector, they get reflected according to the laws of reflection.
- The reflector is usually a parabolic mirror, which has a special shape that helps in focusing the light.
- The parabolic shape of the reflector ensures that the light rays, after reflection, converge at a single point known as the focus.
3. Placing the bulb:
- Placing the bulb very near to the focus of the reflector helps in achieving a parallel beam of light.
- When the bulb is placed at the focus, the light rays emitted by the bulb are reflected by the reflector in such a way that they become parallel to each other.
- This parallel arrangement of light rays results in a powerful and focused beam of light.
4. Advantages of placing the bulb near the focus:
- The parallel arrangement of light rays increases the intensity of the light beam, making it brighter and more focused.
- It allows for long-range illumination, as the parallel rays travel in a straight line without much divergence.
- The focused beam helps in directing the light where it is needed, enhancing visibility and reducing light wastage.
Conclusion:
In torches, search lights, and headlights of vehicles, the bulb is placed very near to the focus of the reflector. This positioning ensures a parallel arrangement of light rays, resulting in a powerful and focused beam of light.
In torches, search lights, and headlights of vehicles, the bulb is placed very near to the focus of the reflector. This positioning ensures that the light rays from the bulb are reflected in a parallel manner, resulting in a focused and powerful beam of light.
Explanation:
1. Purpose of the reflector:
- The reflector in torches, search lights, and headlights of vehicles is used to control and direct the light emitted by the bulb.
- It is designed to reflect the light rays in a specific direction, increasing the intensity and reach of the light beam.
2. Reflectors and light rays:
- When light rays from the bulb fall on the reflector, they get reflected according to the laws of reflection.
- The reflector is usually a parabolic mirror, which has a special shape that helps in focusing the light.
- The parabolic shape of the reflector ensures that the light rays, after reflection, converge at a single point known as the focus.
3. Placing the bulb:
- Placing the bulb very near to the focus of the reflector helps in achieving a parallel beam of light.
- When the bulb is placed at the focus, the light rays emitted by the bulb are reflected by the reflector in such a way that they become parallel to each other.
- This parallel arrangement of light rays results in a powerful and focused beam of light.
4. Advantages of placing the bulb near the focus:
- The parallel arrangement of light rays increases the intensity of the light beam, making it brighter and more focused.
- It allows for long-range illumination, as the parallel rays travel in a straight line without much divergence.
- The focused beam helps in directing the light where it is needed, enhancing visibility and reducing light wastage.
Conclusion:
In torches, search lights, and headlights of vehicles, the bulb is placed very near to the focus of the reflector. This positioning ensures a parallel arrangement of light rays, resulting in a powerful and focused beam of light.
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In torches, search lights and headlights of vehicles, the bulb is plac...
To create a parallel beam of light through which we can see further, the bulb in torches, search lights, and vehicle headlights is placed very close to the focus of the reflector.
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In torches, search lights and headlights of vehicles, the bulb is placeda)Very near to the focus of the reflectorb)Between the pole and the focus of the reflectorc)At the centre of curvature of the reflectord)Between the focus and centre of curvature of the reflectorCorrect answer is option 'A'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about In torches, search lights and headlights of vehicles, the bulb is placeda)Very near to the focus of the reflectorb)Between the pole and the focus of the reflectorc)At the centre of curvature of the reflectord)Between the focus and centre of curvature of the reflectorCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In torches, search lights and headlights of vehicles, the bulb is placeda)Very near to the focus of the reflectorb)Between the pole and the focus of the reflectorc)At the centre of curvature of the reflectord)Between the focus and centre of curvature of the reflectorCorrect answer is option 'A'. Can you explain this answer?.
In torches, search lights and headlights of vehicles, the bulb is placeda)Very near to the focus of the reflectorb)Between the pole and the focus of the reflectorc)At the centre of curvature of the reflectord)Between the focus and centre of curvature of the reflectorCorrect answer is option 'A'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about In torches, search lights and headlights of vehicles, the bulb is placeda)Very near to the focus of the reflectorb)Between the pole and the focus of the reflectorc)At the centre of curvature of the reflectord)Between the focus and centre of curvature of the reflectorCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In torches, search lights and headlights of vehicles, the bulb is placeda)Very near to the focus of the reflectorb)Between the pole and the focus of the reflectorc)At the centre of curvature of the reflectord)Between the focus and centre of curvature of the reflectorCorrect answer is option 'A'. Can you explain this answer?.
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In torches, search lights and headlights of vehicles, the bulb is placeda)Very near to the focus of the reflectorb)Between the pole and the focus of the reflectorc)At the centre of curvature of the reflectord)Between the focus and centre of curvature of the reflectorCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for In torches, search lights and headlights of vehicles, the bulb is placeda)Very near to the focus of the reflectorb)Between the pole and the focus of the reflectorc)At the centre of curvature of the reflectord)Between the focus and centre of curvature of the reflectorCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of In torches, search lights and headlights of vehicles, the bulb is placeda)Very near to the focus of the reflectorb)Between the pole and the focus of the reflectorc)At the centre of curvature of the reflectord)Between the focus and centre of curvature of the reflectorCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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