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प्रश्न
No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be ______.
विकल्प
Plane
Concave
Convex
Either plane or convex
उत्तर
No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be either plane or convex.
Explanation:
A convex mirror always gives a virtual and erect image of a smaller size of the object placed in front of it. Similarly, a plane mirror will always give a virtual and erect image of the same size as that of the object placed in front of it. Therefore, the given mirror could be either plane or convex.
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संबंधित प्रश्न
Find the focal length of a convex mirror whose radius of curvature is 32 cm.
Analyse the following observation table showing variation of image distance (v) with object distance (u) in case of a convex lens and answer the questions that follow, without doing any calculations:
| S. No. | Object distance u(cm) | Image distance v(cm) |
| 1 | −90 | +18 |
| 2 | −60 | +20 |
| 3 | −30 | +30 |
| 4 | −20 | +60 |
| 5 | −18 | +90 |
| 6 | −10 | +100 |
(a) What is the focal length of the convex lens? Give reason in support of your answer.
(b) Write the serial number of that observation which is not correct. How did you arrive at this conclusion?
(c) Take an appropriate scale to draw ray diagram for the observation at S. No. 4 and find the approximate value of magnification.
State the relation between object distance, image distance and focal length of a spherical mirror (concave mirror or 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?
Name the mirror which can give:
an erect and diminished image of an object.
Which type or mirror is usually used as a rear-view mirror in motor cars?
Where would the image be formed by a convex mirror if the object is placed:
between infinity and pole of the mirror?
Draw labelled ray-diagrams to show the formation of image in both the case.
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 image formed by a spherical mirror is virtual. The mirror will be:
(a) concave
(b) convex
(c) either concave or convex
(d) metallic
An object is placed at a distance of 6 cm from a convex mirror of focal length 12 cm. Find the position and nature of the image.
An arrow 2.5 cm high is placed at a distance of 25 cm from a diverging mirror of focal length 20 cm. Find the nature, position and size of the image formed.
A convex mirror used as a rear-view mirror in a car has a radius of curvature of 3 m. If a bus is located at a distance of 5 m from this mirror, find the position of image. What is the nature of the image?
A shop security mirror 5.0 m from certain items displayed in the shop produces on-tenth magnification.
What is the type of mirror?
Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for the object placed:
at 2F1,
What is the effect on the size and position of the image of moving the object (i) towards the lens, and (ii) away from the lens?
Write true or false
The focal length of a convex mirror is equal to its radius of curvature.
A full length image of a distant tall building can definitely be seen by using ______.
The mirror used as rear-view mirror in vehicles ______.
