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प्रश्न
When the reflecting surface is curved outwards the mirror formed will be ______.
विकल्प
concave mirror
convex mirror
plane mirror
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उत्तर
When the reflecting surface is curved outwards the mirror formed will be convex mirror
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संबंधित प्रश्न
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 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 the nature of a mirror having a focal length of, +10 cm?
Fill in the following blank with a suitable word:
A ray of light which is parallel to the principal axis of a convex mirror, appears to be coming from ............ after reflection from the mirror.
Give two uses of a convex mirror. Explain why you would choose convex mirror for these uses.
An object is placed well outside the principal focus of a convex lens. Draw a ray diagram to show how the image is formed, and say whether the image is real or virtual.
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?
The focal length of a convex mirror is equal to its radius of curvature.
State whether true or false. If false, correct the statement.
The convex mirror always produces a virtual, diminished and erect image of the object.
The image formed by a convex mirror is always ______.
