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प्रश्न
Draw a neat two ray diagram to illustrate how a concave mirror is used as a shaving mirror.
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उत्तर
We know that when an object is placed between P and F of a concave mirror, it forms a virtual and enlarged image. Thus, by using a concave mirror we can have a proper shave, as the tiny hairs are clearly visible.
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संबंधित प्रश्न
State the characteristics of the image formed by a plane mirror.
Write true or false of the following statement.
The image of the right hand in a plane mirror looks like that of a left hand.
Draw diagrams to show the difference between regular and irregular reflection.
In the figure is shown a concave mirror. A is a point on the principal axis. If an object O is kept at A, image is formed on A itself. Copy the diagram. Draw the image in the diagram. Is the image real or virtual?
Measure the distance PA and write it in the diagram. What is the distance PA called?
Mark a point B on the principal axis, at which, if a point source of light is kept, the rays travel parallel to principal axis after reflection from M. What is point B called?
State the direction of incident ray which after reflection from a spherical mirror retraces its path. Give reason for your answer.
Which of the following can make a parallel beam of light when light from a point source is incident on it?
Match the following:
| 1. | Rubber | a. | Erect |
| 2. | Greased paper | b. | Inverted |
| 3. | Real image | c. | Opaque medium |
| 4. | Virtual image | d. | Translucent medium |
The angle of incidence is equal to the angle of reflection for perfect reflection.
