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प्रश्न
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?
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उत्तर
As the object is placed at A and its image is also formed at A, so the object must be at the center of curvature (C).
PA is called the radius of curvature and on measuring PA = 4.8 cm. Point B marked on the principal axis is called the principal focus.
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संबंधित प्रश्न
Wirte down the letter C and I as seen in a plane mirror.
State two uses of a plane mirror.
The diagram in Figure shows a point object P in front of a plane mirror MM1.
(a) Complete the diagram by taking two rays from the point P to show the formation of its image.
(b) In the diagram, mark the position of eye to see the image.
(c) Is the image formed real or virtual? Explain why?
What do you understand by the Diffused Light?
State whether the following statement is true or false. If false, correct it.
The image in a plane mirror is situated in the mirror.
Complete the path of incident ray in the following case.
______Surface reflects the light well.
The light ray gets _______ when it falls on any polished surface.
Which of the following ray diagrams is correct for the ray of light incident on a lens shown in figure?
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 |
| A | B |
 |
 |
| C | D |
