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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.
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.
Which type or mirror is usually used as a rear-view mirror in motor cars?
A ray of light of going towards the focus of a convex mirror becomes parallel to the principal axis after reflection from the mirror. Draw a labelled diagram to represent this situation.
Where would the image be formed by a convex mirror if the object is placed:
between infinity and pole of the mirror?
Draw labelled ray-diagrams to show the formation of image in both the case.
Draw diagram to show how a convex mirror can be used to give a large field of view.
The image formed by a spherical mirror is virtual. The mirror will be:
A convex mirror used as a rear-view mirror in a car has a radius of curvature of 3 m. If a bus is located at a distance of 5 m from this mirror, find the position of image. What is the nature of the image?
Name two factors on which the focal length of a lens depends.
Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for the object placed:
- at 2F1,
- between F₁ and the optical centre O of the lens.
Which of the above two cases shows the use of a convex lens as a magnifying glass? Give reasons for your choice.
The magnification produced by a spherical mirror and a spherical lens is + 0.8.
(a) The mirror and lens are both convex
(b) The mirror and lens are both concave
(c) The mirror is concave but the lens is convex
(d) The mirror is convex but the lens is concave
Write true or false
At the point of incidence, a line drawn at right angles to the surface, separating the two media, is called the normal.
A .............. mirror is obtained on silvering the outer surface of a part of a hollow glass sphere.
A convex mirror is used
State two uses of a convex mirror.
When the reflecting surface is curved outwards the mirror formed will be ______.
An object at a distance of +15 cm is slowly moved towards the pole of a convex mirror. The image will get ______.
The image formed by these mirrors is ______ than the object.
Higher-Order Thinking Skills:
A convex mirror is in water. What should be the change in its focal length?
