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प्रश्न
The focal length of a convex mirror is equal to its radius of curvature.
विकल्प
True
False
उत्तर
False.
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संबंधित प्रश्न
What is meant by (i) principal focus of a convex mirror, and (ii) focal length of a convex mirror?
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.
If you want to see an enlarged image of your face, state whether you will use a concave mirror or a convex mirror?
Where would the image be formed by a convex mirror if the object is placed:
at infinity?
Draw labelled ray-diagrams to show the formation of image in both the case.
Name two factors on which the focal length of a lens depends.
An object is placed well outside the principal focus of a convex lens. Draw a ray diagram to show how the image is formed, and say whether the image is real or virtual.
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?
Light travels in the same straight line path while passing through different media.
The distance between an object and a convex lens is changing. It is noticed that the size of the image formed on a screen is decreasing. Is the object moving in a direction towards the lens or away from it?
Higher-Order Thinking Skills:
A convex mirror is in water. What should be the change in its focal length?
