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प्रश्न
A driver uses a convex mirror as a rearview mirror. Explain the reason with the help of a ray diagram.
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उत्तर
A convex mirror always forms a small and upright image between pole and focus. That means in a small area of mirror driver can see all the traffic coming from behind.
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संबंधित प्रश्न
An object is placed at a distance of 30 cm in front of a convex mirror of focal length 15 cm. Write four characteristics of the image formed by the mirror.
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 diverging mirror is
(a) a plane mirror
(b) a convex mirror
(c) a concave mirror
(d) a shaving mirror
What is the nature of a mirror having a focal length of, +10 cm?
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.
What would your image look like if you stood close to a large:
convex mirror?
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
The focal length of a convex mirror is equal to its radius of curvature.
Write true or false
The focal length of a convex mirror is equal to its radius of curvature.
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)
