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प्रश्न
Write the spherical mirror's formula and explain the meaning of each symbol used in it.
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उत्तर
The spherical mirror's formula is `1/"u" + 1/"v" = 1/"f"`
Here, u is the object distance, v is the image distance and f is the focal length of the mirror.
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संबंधित प्रश्न
A diverging lens is used in:
(a) a magnifying glass
(b) a car to see objects on rear side
(c) spectacles for the correction of short sight
(d) a simple camera
A 50 cm tall object is at a very large distance from a diverging lens. A virtual, erect and diminished image of the object is formed at a distance of 20 cm in front of the lens. How much is the focal length of the lens?
Write true or false
A virtual image formed by a spherical mirror is always erect and situated behind the mirror.
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Name the kind of mirror used to obtain:
A real and diminished image.
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The radius of curvature of a spherical mirror is 18 cm. What is the focal length of this mirror?
In normal adjustment, for a refracting telescope, the distance between objective and eye piece is 30 cm. The focal length of the objective, when the angular magnification of the telescope is 2, will be ______.
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?
