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प्रश्न
A ray of light passing through centre of curvature of a spherical mirror, after reflection
विकल्प
passes through the focus
passes through the pole
becomes parallel to the principal axis
retraces its own path.
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उत्तर
retraces its own path.
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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.
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.
If the image formed by a spherical mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it? Draw a labelled ray diagram to support your answer.
Draw a labelled ray diagram to show the formation of image of an object by a convex mirror. Mark clearly the pole, focus and centre of curvature on the diagram.
A shop security mirror 5.0 m from certain items displayed in the shop produces one-tenth magnification.
- What is the type of mirror?
- What is the radius of curvature of the mirror?
Draw the given diagram in your answer book and complete it for the path of a ray of light after passing through the lens.
Write true or false
At the point of incidence, a line drawn at right angles to the surface, separating the two media, is called the normal.
Write true or false
The focal length of a convex mirror is equal to its radius of curvature.
A driver uses a convex mirror as a rearview mirror. Explain the reason with the help of a ray diagram.
The field of view is maximum for ______.
