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प्रश्न
Visit a nearby hospital. You can also visit the clinic of an ENT specialist, or a dentist. Request the doctor to show you the mirrors used for examining ear, nose, throat and teeth. Can you recognise the kind of mirror used in these instruments?
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उत्तर
Visit to a Hospital
Activity:
- Visit a nearby hospital, the clinic of an ENT specialist, or a dentist.
- Request the doctor to show you the mirrors used for examining the ear, nose, throat, and teeth.
- Observe the mirrors and try to recognize the kind of mirrors used in these instruments.
Observation:
- Doctors use small, specially designed mirrors in their instruments to examine patients' ears, nose, throat, and teeth.
Explanation:
The mirrors used in these medical instruments are typically concave mirrors.
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- Concave Mirrors: These mirrors are curved inward, allowing them to focus light onto a specific area. They provide a clear and magnified view of small and detailed structures like the ear canal, nasal passages, throat, and teeth.
Conclusion:
- Concave mirrors are commonly used in medical instruments to examine the ear, nose, throat, and teeth. They help doctors by focusing light and providing a magnified and clear view of the specific areas being examined.
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संबंधित प्रश्न
Define the following term in the context of spherical mirrors:- Principal focus
What happens when a ray of light falls normally (or perpendiculary) on the surface of a plane mirror?
How is a spherical mirror used to converge a beam of light at a point? Name the type of mirror used.
Define the following terms in the context of spherical mirrors :
(i) Pole
(ii) Centre of curvature
(iii) Radius of curvature
(iv) Principal axis
AB and CD, two spherical mirrors, from parts of a hollow spherical ball with its centre at O as shown in the diagram. If arc AB = `1/2` arc CD, what is the ratio of their focal lengths? State which of the two mirrors will always form virtual image of an object placed in front of it and why.
A concave mirror forms a virtual image of size twice that of the object placed at a distance 5 cm from it. Find:
- the focal length of the mirror
- position of image
A point light source is kept in front of a convex mirror at a distance of 40 cm. The focal length of the mirror is 40 cm. Find the position of image.
Is real image always inverted?
What is the focal length (f) of a mirror?
