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प्रश्न
How is the focal length of a spherical mirror related to its radius of curvature?
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उत्तर
Focal length is half the radius of curvature of a spherical mirror.
f = `"R"/2`
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संबंधित प्रश्न
Match the items given in Column I with one or more items of Column II.
| Column I | Column II | ||
| (a) | A plane mirror | (i) | Used as a magnifying glass. |
| (b) | A convex mirror | (ii) | Can form image of objects spread over a large area. |
| (c) | A convex lens | (iii) | Used by dentists to see enlarged image of teeth. |
| (d) | A concave mirror | (iv) | The image is always inverted and magnified. |
| (e) | A concave lens | (v) | The image is erect and of the same size as the object. |
| (vi) | The image is erect and smaller in size than the object. |
Name the spherical mirror which has:
(a) virtual principal focus.
(b) real principal focus.
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
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.
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 term principal focus in case of convex mirror. Draw a convex mirror and show its principal focus and focal length clearly.
A student traces the path of a ray of light passing through a rectangular slab.
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For measuring the angle of incidence, he must position the protractor in the manner shown in the figure:
Explain why a ray of light passing through the center of curvature of a concave mirror, gets reflected along with the same pattern.
