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प्रश्न
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संबंधित प्रश्न
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
A small object is placed 150 mm away from a diverging lens of focal length 100 mm.
(i) Copy the figure below and draw rays to show how an image is formed by the lens.
Figure
(ii) Calculate the distance of the image from the lens by using the lens formula.
Name the kind of mirror used to obtain :
A real and enlarged image
Write the spherical mirror's formula and explain the meaning of each symbol used in it.
State the kind of mirror used
(a) By a dentist,
(b) As a search-light reflector.
Define the following term in relation to concave mirror.
Principal focus
The diagram below shows the parallel rays incident on a convex mirror. C is the centre of the curvature of the mirror. By drawing the paths of the reflected rays, label the focus F and hence find the focal length of the mirror.
The distance from the center of curvature of the mirror to the pole is called the focal length of the mirror.
