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Question
Assertion: For observing the traffic at a hairpin bend in mountain paths a plane mirror is preferred over convex mirror and concave mirror.
Reason: A convex mirror has a much larger field of view than a plane mirror or a concave mirror.
Options
If both assertion and reason are true and reason is the correct explanation.
If both assertion and reason are true and reason is not the correct explanation.
If assertion is true but reason is false.
If assertion is false but reason is true.
Solution
If assertion is false but reason is true.
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RELATED QUESTIONS
Draw ray diagrams for the cases of images obtained in concave mirrors as described in the table below.
| Images formed by concave mirrors | ||||
| No. | Position of the object | Position of the image | Nature of image | Size of the image |
| 1 | Between pole and focus | Behind the mirror | Erect, virtual | Magnified |
| 2 | At the focus | At infinity | Inverted, real | Very large |
| 3 | Between focus and centre of curvature | Beyond the centre of curvature | Inverted, real | Magnified |
| 4 | At the centre of curvature |
At the centre of curvature | Inverted, real | Same as the object |
| 5 | Object between infinity and Centre of curvature | Between the centre of curvature and focus | Inverted, real | Diminished |
| 6 | Object at infinity | At focus | Inverted, real | Diminished |
If an object is placed at the focus of a concave mirror, where is the image formed?
- Complete the diagram to show how a concave mirror forms the image of the object.
- What is the nature of the image?
Which of the following ray diagrams is correct for the ray of light incident on a concave mirror as shown in Figure?
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| Fig. A | Fig. B | Fig. C | Fig. D |
Draw ray diagrams showing the image formation by a concave mirror when an object is placed
- between pole and focus of the mirror
- between focus and centre of curvature of the mirror
- at centre of curvature of the mirror
- a little beyond centre of curvature of the mirror
- at infinity
List four properties of the image formed by the concave mirror when the object is placed between F & P.
Rohit wants to have an erect image of an object using a converging mirror of focal length 40 cm.
- Specify the range of distance where the object can be placed in front of the mirror. Justify.
- Draw a ray diagram to show image formation in this case.
- State one use of the mirror based on the above kind of image formation.
A 10 cm long pencil is placed 5 cm in front of a concave mirror having a radius of curvature of 40 cm.
- Determine the position of the image formed by this mirror.
- What is the size of the image?
- Draw a ray diagram to show the formation of the image as mentioned in part (i).
