Question

State whether true or false.
A dark patch formed behind an opaque body when the opaque body is placed in the path of a light beam is called an image.

Answer 1

Hint: Opaque body means they do not allow the light to pass through it. If such a body is placed in between the path of light it obstructs the path of light. This results in the formation of the shadow of the object. That dark patch is called the shadow. We cannot be called the dark patch as an image.

Complete step-by-step answer:
The nature of the shadow depends upon the relative distance, angle, and relative size between the source and the object. Light is a wonderful thing in our life, because of light we can see objects around us. Then there is no image is formed. Because of this opaque body, a dark region is formed around it that is called the shadow. It is only when the light rays are obstructed we get the shadow of the object. The size of the shadow keeps on changing with the position of the sun. Transparent objects cannot form a shadow. For example during the solar eclipse moon’s shadow falls on the earth. During lunar eclipse earth’s shadow falls on the moon.

The image is entirely different from the shadow. Image is defined as the ray of light coming from the source or an object falls on the surface( mirror or lens) then it reflects or refracts at a point then we can get an image. Therefore we can say an image is a collection of focus points of light rays coming from an object. Two types of images are a real image and a virtual image.

The given statement is false because a dark patch formed behind an opaque body when the opaque body is placed in the path of a light beam is called the shadow.
Additional information:
1. Luminous object: Luminous objects can produce their light. Sun is an example of a luminous object. Sun produces its light.
2. Illuminated object: These objects do not produce their light but still we can see them. These objects reflect the light which comes from the luminous object when light falls on them. Light falls on all the objects but not all the objects form a shadow.
Note:
The shape of the shadows doesn't need to be identical to the shape of the object. The size of the shadow depends on the direction of light falling on it. Light falls on all the objects but not all the objects form a shadow.