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प्रश्न
Draw the following diagram in your answer book and show the formation of image of the object AB with the help of suitable rays:
उत्तर
Using the following rules for image formation:
- A ray of light passing through the centre of curvature of a concave mirror is reflected along the same path, and
- A ray of light passing through the focus of a concave mirror becomes parallel to the principal axis after reflection,
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संबंधित प्रश्न
A student obtained a sharp image of a candle flame placed at the distant end of the laboratory table on a screen using a concave mirror to determine its focal length. The teacher suggested him to focus a distant building, about 1 km away from the laboratory, for getting more correct value of the focal length. In order to focus the distant building on the same screen, the student should slightly move the
(a) mirror away from the screen
(b) screen away from the mirror
(c) screen towards the mirror
(d) screen towards the building
List four specific characteristics of the images of the objects formed by convex mirrors.
To construct ray diagrams, two rays of light are generally so chosen that it is easy to determine their directions after reflection from a mirror. Choose two such rays and state the path/direction of these rays after reflection from a concave mirror. Use these two rays to find the position and nature of the image of an object placed at a distance of 8 cm from a concave mirror of focal length 12 cm.
Copy this figure in your answer book and show the direction of the light ray after reflection:
Explain why, a ray of light passing through the centre of curvature of a concave mirror gets reflected back along the same path.
between its pole and focus
Describe the nature, size and position of the image formed in each case.
State one use of concave mirror bases on the formation of image as in case (i) above.
Draw and complete the following diagrams to show what happens to the beams of light as they enter the glass block and then leave it:
Give any two applications of a concave and convex mirror.
Explain the images formed by a concave mirror.
A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by ______.
