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प्रश्न
Magnification produced by a rear view mirror fitted in vehicles
पर्याय
is less than one
is more than one
is equal to one
can be more than or less than one depending upon the position of the object in front of it
उत्तर
is less than one
Explanation -
The mirror fitted in vehicles are convex mirror. The images formed by the convex mirror are virtual, erect and diminished or point size. It shows that the height of image will be always smaller than the height of object. The relation between the height of image and the magnification is, `"m" = "h"_"i"/"h"_"o"`
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संबंधित प्रश्न
If the image formed by a mirror for all positions of the object placed in front of it is always diminished, erect and virtual, state the type of the mirror and also draw a ray diagram to justify your answer. Write one use such mirrors are put to and why.
Define the radius of curvature of spherical mirrors.
Draw diagram to show the action of convex mirror on a beam of parallel light rays. Mark on this diagram principal axis, focus F, centre of curvature C, pole P and focal length f, of the convex mirror.
Name the mirror which can give:
an erect and diminished image of an object.
What type of mirror should be used as a shop security mirror?
Draw the given diagram in your answer book and complete it for the path of a ray of light after passing through the lens.
An object is placed at the following distance from a convex lens of focal length 15 cm:
(a) 35 cm
(b) 30 cm
(c) 20 cm
(d) 10 cm
Which position of the object will produce:
(i) a magnified real image?
(ii) a magnified virtual image?
(iii) a diminished real image?
(iv) an image of same size as the object?
At the point of incidence, a line drawn at right angles to the surface, separating the two media, is called the normal.
Identify the device used as a spherical mirror or lens in following case, when the image formed is virtual and erect in case.
Object is placed between infinity and device, image formed is diminished and between pole and focus, behind it.
Match the following.
| Column I | Column II |
| Convex mirror | Radio telescopes |
| Parabolic mirror | Rear-view mirror |
| Snell’s law | Kaleidoscope |
| Dispersion of light | sin i/sin r =μ |
| Refractive index | Rainbow |
