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प्रश्न
State two uses of a convex mirror.
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उत्तर
Two USES OF CONVEX MIRROR:
- It is used as a REARVIEW MIRROR.
- It is used as a VIGILANCE MIRROR
- It is used as a REFLECTOR IN STREET LAMPS
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संबंधित प्रश्न
Why do we prefer a convex mirror as a rear-view mirror in vehicles?
In a convex spherical mirror, reflection of light takes place at:
(a) a flat surface
(b) a bent-in surface
(c) a bulging-our surface
(d) an uneven surface
What is the nature of a mirror having a focal length of, +10 cm?
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.
The radius of curvature of a convex mirror used as a rear view mirror in a moving car is 12.0 m. A truck is coming from behind it at a distance of 3.54 m. Calculate (a)
- position and
- size of the image relative to the size of the truck.
- What will be the nature of the image?
An object 1 cm tall is placed 30 cm in front of a convex mirror of focal length 20 cm. Find the size and position of the image formed by the convex mirror.
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?
A ............ mirror always forms a virtual image.
To determine the focal length of a convex lens by obtaining a sharp image of a distant object we generally follow the following steps which are not in proper sequence.
(a) Hold the lens between the object and the screen
(B) Measure the distance between the lens and the screen
(C) Select a well lit distant object
(D) Place a screen opposite to the object on the lab table
(e) Adjust the position of the lens to form a sharp image
The correct sequence of these steps is:
(A) c, a, d, e, b
(B) c, d, a, e, b
(C) c, d, e, a, b
(D) c, a, e, d, b
The Convex mirror always forms ______ and ______ image.
