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प्रश्न
Which type or mirror is usually used as a rear-view mirror in motor cars?
उत्तर
A diverging mirror, i.e. convex mirror, is used as a rear-view mirror in motor cars, as it has a wider area of view, and always forms virtual, erect and small-sized images of a large number of objects at the same time.
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संबंधित प्रश्न
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.
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.
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
Name two factors on which the focal length of a lens depends.
The angle formed between the normal and the refracted ray is known as the angle of incidence.
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.
The field of view is maximum for ______.
Higher-Order Thinking Skills:
A convex mirror is in water. What should be the change in its focal length?
