Advertisements
Advertisements
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?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
A plane mirror _________ reflects 100 percent light falling on it.
Copy the figure. By taking two rays from point A, show the formation of image. State four characteristics of the image.
The word PLATE written on a paper is held in front of a plane mirror. Write down the letters as seen in the following case.
The paper is held perpendicular to the mirror.
State whether true or false. If false, correct the statement.
The reason for brilliance of diamonds is total internal reflection of light.
______ through which light can pass partially.
Total internal reflection will occur if the angle of reflection is ______.
