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प्रश्न
Define the term principal focus in case of convex mirror. Draw a convex mirror and show its principal focus and focal length clearly.
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उत्तर
Focal length is the distance between pole (P) and focus (F)
(F) Focus is a point on principal axis where rays of light appear to meet.
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संबंधित प्रश्न
Explain the following term related to spherical lenses: focal length
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?
A coin placed at the bottom of a vessel appears to be raised when water is poured in the vessel.
Figure shows a concave mirror with its pole at P, focus F and centre of curvature C. Draw ray diagram to show the formation of image of an object OA.
Define the following term:
concave mirror
A concave mirror can be used to produce a parallel beam of light. Draw a ray to illustrate this.
A spherical mirror whose reflecting surface is curved outwards is called ______ mirror.
