Advertisements
Advertisements
प्रश्न
Why are the mirrors fitted on the outside of cars convex?
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.
APPEARS IN
संबंधित प्रश्न
Why do we prefer a convex mirror as a rear-view mirror in vehicles?
No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be ______.
An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position and nature of the image.
An object is placed at a distance of 40 cm in front of a convex mirror of radius of curvature 40 cm. List four characteristics of the image formed by the mirror.
Define the radius of curvature of spherical mirrors.
What is meant by (i) principal focus of a convex mirror, and (ii) focal length of a convex mirror?
A mirror forms an image which is 30 cm from an object and twice its height.
(a) Where must the mirror be situated?
(b) What is the radius of curvature?
(c) Is the mirror convex or concave?
State whether the following statement is true or false:
A diverging mirror is used as a rear-view mirror.
Draw a labelled ray diagram to show the formation of image of an object by a convex mirror. Mark clearly the pole, focus and centre of curvature on the diagram.
Draw diagram to show how a convex mirror can be used to give a large field of view.
Whatever be the position of the object, the image formed by a mirror is virtual, erect and smaller than the object. The mirror then must be:
(a) plane
(b) concave
(c) convex
(d) either concave or convex
Draw a diagram to represent a convex mirror. On this diagram mark principal axis, principal focus F and the centre of C if the focal length of convex mirror is 3 cm.
A shop security mirror 5.0 m from certain items displayed in the shop produces on-tenth magnification.
What is the type of mirror?
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
Numerical problem.
A concave mirror produces three times magnified real image of an object placed at 7 cm in front of it. Where is the image located? (Ans: 21 cm in front of the mirror)
The image formed by a convex mirror is always ______.
Assertion: A real image cannot be produced by plane or convex mirror.
Reason: The focal length of a convex mirror is always taken as positive.
Why a convex mirror is preferred for rearview mirrors in cars?
Higher-Order Thinking Skills:
A convex mirror is in water. What should be the change in its focal length?
