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प्रश्न
Why are the mirrors fitted on the outside of cars convex?
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उत्तर
- The image formed by a convex mirror is small and straight.
- This image remains straightforward; But as we move the mirror further away from the object, the image becomes smaller.
- As a result, we see all the surrounding images in the mirror.
- The use of convex mirrors in the outside of the vehicle gives the driver a straight, narrow and clear image of the vehicles behind the vehicle.
- Therefore, the mirror fitted on the outside of the vehicle is convex.
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संबंधित प्रश्न
Find the focal length of a convex mirror whose radius of curvature is 32 cm.
Analyse the following observation table showing variation of image distance (v) with object distance (u) in case of a convex lens and answer the questions that follow, without doing any calculations:
| S. No. | Object distance u(cm) | Image distance v(cm) |
| 1 | −90 | +18 |
| 2 | −60 | +20 |
| 3 | −30 | +30 |
| 4 | −20 | +60 |
| 5 | −18 | +90 |
| 6 | −10 | +100 |
(a) What is the focal length of the convex lens? Give reason in support of your answer.
(b) Write the serial number of that observation which is not correct. How did you arrive at this conclusion?
(c) Take an appropriate scale to draw ray diagram for the observation at S. No. 4 and find the approximate value of magnification.
Find the nature and focal length of a spherical mirror whose radius of curvature is +24 cm.
If the image formed by a spherical mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it? Draw a labelled ray diagram to support your answer.
State the relation between object distance, image distance and focal length of a spherical mirror (concave mirror or convex mirror).
What type of image/images are formed by:
a concave mirror?
Which mirror has a wider field of view?
If you want to see an enlarged image of your face, state whether you will use a concave mirror or a convex mirror?
What kind of mirrors are used in big shopping centres to watch the activities of the customers?
If a driver has one convex and one plane rear-view mirror, how would the images in each mirror appear different?
Name two factors on which the focal length of a lens depends.
A .............. mirror is obtained on silvering the outer surface of a part of a hollow glass sphere.
State whether true or false. If false, correct the statement.
The convex mirror always produces a virtual, diminished and erect image of the object.
The mirror used as rear-view mirror in vehicles ______.
The nature of image formed by a convex mirror when the object distance from the mirror is less than the distance between pole and focal point (F) of the mirror would be ______.
Magnification produced by a rear view mirror fitted in vehicles
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.
The Convex mirror always forms ______ and ______ image.
