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प्रश्न
Differentiate between a reflection and a shadow
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उत्तर
| Sr No. | Reflection | Shadow |
| 1. | When light falls on a surface, the direction of ray is changed. This change in direction is known as reflection of light. | Shadow is an image formed by obstruction of light. |
| 2. | Eg.: You see your reflection in a pool of water or mirror. | Eg.: If you place your hand in front of a candle, you will see the image of the hand on the wall. This image will show only the outline of the object placed in front of the light source. |
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संबंधित प्रश्न
State four characteristics of the image formed by a plane mirror.
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?
Identify the following kind of beam of light.

State whether the following statement is true or false. If false, correct it.
The image formed in a plane mirror is the real, erect, and same size as that of the object.
Complete the path of incident ray in the following case.

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 cannot pass.
Suppose we wish to obtain the real image of a distant tree. Explain two possible ways in which we can do it.
Play with a mirror
Write your name with a sketch pen on a thin sheet of paper, polythene or glass. Read your name on the sheet while standing in front of a plane mirror. Now look at your image in the mirror.
