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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
If the image formed by a mirror for all positions of the object placed in front of it is always diminished, erect and virtual, state the type of the mirror and also draw a ray diagram to justify your answer. Write one use such mirrors are put to and why.
What is meant by the principal focus of a convex mirror?
Which type of mirror has:
positive focal length?
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?
State three characteristics of the image formed by a convex mirror.
- Draw a labelled ray diagram to show the formation of image in a convex mirror when the object is at infinity. Mark clearly the pole and focus of the mirror in the diagram.
- State three characteristics of the image formed in this case.
- Draw diagram to show how a convex mirror can be used to give a large field of view.
Write true or false
The focal length of a convex mirror is equal to its radius of curvature.
What do you observe when an object is placed anywhere between P and infinity in front of a convex mirror?
Match the following.
| Column I | Column II |
| Convex mirror | Radio telescopes |
| Parabolic mirror | Rear-view mirror |
| Snell’s law | Kaleidoscope |
| Dispersion of light | sin i/sin r =μ |
| Refractive index | Rainbow |
