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प्रश्न
The focal length of a convex mirror is equal to its radius of curvature.
विकल्प
True
False
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उत्तर
False.
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संबंधित प्रश्न
Define the radius of curvature of spherical mirrors.
A student obtains a blurred image of a distant object on a screen using a convex lens. To obtain a distinct image on the screen he should move the lens
(A) away from the screen
(B) towards the screen
(C) to a position very far away from the screen
(D) either towards or away from the screen depending upon the position of the object
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.
If a driver has one convex and one plane rear-view mirror, how would the images in each mirror appear different?
Two big mirrors A and B are fitted side by side on a wall. A man is standing at such a distance from the wall that he can see the erect image of his face in both the mirrors. When the man starts walking towards the mirrors, he find that the size of his face in mirror A goes on increasing but that in mirror B remains the same.
(a) mirror A is concave and mirror B is convex
(b) mirror A is plane and mirror B is concave
(c) mirror A is concave and mirror B is plane
(d) mirror A is convex and mirror B is concave
The angle formed between the normal and the refracted ray is known as the angle of incidence.
A convex mirror is used
Why are the mirrors fitted on the outside of cars convex?
Assertion: Convex mirrors are used as a rearview mirror in vehicles for observing traffic at our back.
Reason: A convex mirror has a much larger field of view.
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.
