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Questions and Answers
Which type of mirror is commonly used in torches, search-lights, and vehicles headlights?
Which type of mirror is commonly used in torches, search-lights, and vehicles headlights?
- Concave mirror (correct)
- Plane mirror
- Cylindrical mirror
- Convex mirror
What is the use of large concave mirrors?
What is the use of large concave mirrors?
- To produce electricity
- To see a larger image of the face
- To reflect light in a room
- To concentrate sunlight to produce heat in solar furnaces (correct)
What is the use of concave mirrors in dentistry?
What is the use of concave mirrors in dentistry?
- To see the ears of the patient
- To see the throat of the patient
- To see large images of the teeth of patients (correct)
- To see the nose of the patient
Which of the following is true about the magnification produced by a spherical mirror?
Which of the following is true about the magnification produced by a spherical mirror?
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What happens to a light ray when it travels obliquely from a rarer medium to a denser medium?
What happens to a light ray when it travels obliquely from a rarer medium to a denser medium?
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What is the relationship between the object-distance (u), image-distance (v), and the focal length (f) of a spherical lens according to the lens formula?
What is the relationship between the object-distance (u), image-distance (v), and the focal length (f) of a spherical lens according to the lens formula?
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Study Notes
Types of Mirrors and Their Uses
- Concave mirrors are commonly used in torches, search-lights, and vehicle headlights due to their ability to focus light into a parallel beam.
- Large concave mirrors are utilized in telescopes and solar concentrators to gather and concentrate light for better viewing and energy efficiency.
Concave Mirrors in Dentistry
- In dentistry, concave mirrors are employed to provide magnification and improved visibility of oral cavities, enhancing the effectiveness of dental procedures.
Spherical Mirror Magnification
- The magnification produced by a spherical mirror depends on the object's position relative to the focal point and the mirror's curvature, affecting the size and clarity of the resulting image.
Light Ray Behavior at Media Boundaries
- When a light ray travels obliquely from a rarer medium (like air) to a denser medium (like glass or water), it bends towards the normal line, altering its path.
Lens Formula Relationships
- The lens formula states that the relationship between the object-distance (u), image-distance (v), and focal length (f) of a spherical lens is represented by the equation: 1/f = 1/v - 1/u.
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