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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
Which type of mirror can form a real image?
Define (a) centre of curvature (b) radius of curvature (c) pole (d) principal axis, and (e) aperture, of a spherical mirror with the help of a labelled diagram
The diverging lens in part (a) is replaced by a converging lens also of focal length 100 mm. The object remains in the same position and an image is formed by the converging lens. Compare two properties of this image with those of the image formed by the diverging lens in part (a).
Draw a ray diagram to show the formation of image by a concave mirror for an object placed between its pole and focus. State three characteristics of the image.
State the position of object for which the image formed by a concave mirror is of same size.
Name the kind of mirror used to obtain :
A real and enlarged image
An object 5 cm high is placed at a distance 60 cm in front of a concave mirror of focal length 10 cm. Find the position and size of the image.
An object is placed at 4 cm distance in front of a concave mirror of radius of curvature 24 cm. Find the position of image. Is the image magnified?
What is the relation between focal length and radius of curvature of a concave mirror?
