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प्रश्न
What type of image/images are formed by:
a concave mirror?
उत्तर
A concave mirror can form
1) virtual, erect and large-sized images
2) real and inverted images of any size (small, same size or large)
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.
In a convex spherical mirror, reflection of light takes place at:
(a) a flat surface
(b) a bent-in surface
(c) a bulging-our surface
(d) an uneven surface
Name the mirror which can give:
an erect and diminished image of an object.
An object 1 cm tall is placed 30 cm in front of a convex mirror of focal length 20 cm. Find the size and position of the image formed by the convex mirror.
Light travels in the same straight line path while passing through different media.
At the point of incidence, a line drawn at right angles to the surface, separating the two media, is called the normal.
State two uses of a convex mirror.
An object at a distance of +15 cm is slowly moved towards the pole of a convex mirror. The image will get ______.
The distance between an object and a convex lens is changing. It is noticed that the size of the image formed on a screen is decreasing. Is the object moving in a direction towards the lens or away from it?
