Class 6 Science Chapter 11 MCQ

Here, are all the statements are correct. Hence, your answer will be option [D].

The periscope is a device which gives us the higher view than normal. By using a periscope, we can see the objects on the other side of a high wall without having to climb over the wall. A soldier sitting in a trench can observe the enemy activities above the ground by using a periscope. Actually, a periscope works on the reflection of light from the two plane mirrors angle two parallel to one another.

Here, are all the statements are correct. Hence, your answer will be option [D].

As we know that the way light is reflected from a surface depends on whether the surface is rough or smooth. Most of the objects have rough surfaces. Due to their rough surfaces most of the objects reflect light in all directions. This is called a regular reflections or diffuse reflection. For example, a piece of paper and leather bag have a rough surface. So, it reflects the light falling on it in all directions.

A plane mirror is a thin, flat and smooth sheet of class having a shiny coating of silver metal or aluminum metal on one side. The regular reflection of light by a smooth, surface of a plane mirror produces an image of our face when we look into the mirror. A plane mirror always forms virtual images. The reflections of objects in water are also virtual images.

Those materials which allow all the light to pass through them are called transparent materials. The materials like glass, polythene, air, water and groundnut oil are transparent materias. They allow almost all the light to pass through them. Remember, glass is a transparent material which allows all the light coming from the material kept inside it.

The materials like butter paper, oil paper, tissue paper, sheet of white cotton, frosted glass, muddy water and clouds are translucent materials. They allow only a part of the light falling on their surface to pass through them. As we cannot see clearly through a translucent material.

The materials like butter paper, oil paper, tissue paper, sheet of white cotton, ground glass (frosted glass), muddy water and clouds are translucent materials. They allow only a part of the light falling on their surface to pass through them. As we cannot see clearly through a translucent material.

Here, are all the statements are correct. Hence, your answer will be option [D].

Those materials which allow all the light to pass through them are called transparent materials. The materials like water, glass, polythene, air and groundnut oil are transparent materials. They allow almost all the light to pass through them.

Here, are all the statements are correct. Hence, your answer will be option [D].

Here, are all the statements are incorrect. Hence, your answer will be option [C]. [A] The pinhole camera works on the principle that light travels in straight lines. [B] An inverted image is formed in a pinhole camera very simply. [D] The pinhole camera is a simple device to see the images of various objects.

An object which does not give out its own light is called a non-luminous object. As we know that mirror is a non-luminous object which does not have its own light. Actually, when sun light falls on the surface of mirror, then all the sunlight is reflected or sent by the mirror towards the certain direction. And to us, it appears as if the light is being given out by the mirror itself. But in reality, mirror light is the sunlight which is reflected from the surface of mirror. Thus, mirror behaves as a the non-luminous. It works as a reflector of sunlight just like the moon.

Our shadow is shortest at noon. The length of our shadow goes on decreasing till noon. The length of our shadow starts increasing in the afternoon. And our shadow becomes very long in the evening and just before sunset.

The shadow of an object has the different characteristics as the shadow of an object is erect. The shadow can be smaller than the object, equal to the object or bigger than the object. The shadow of an object is real. Irrespective of the color of the object, the shadow is always black.

Our shadow is shortest at noon. The length of our shadow goes on decreasing till noon. The length of our shadow starts increasing in the afternoon. And our shadow becomes very long in the evening or early morning and just before sunset. As the sun rises in the sky, the shadow of a building shortens.

The shadow of an object is real because it can be formed on a screen.

The image in a plane mirror is laterally inverted or sideways reversed with respect to the object.

Here, are all the statements are correct. Hence, your answer will be option [D].

The image formed in a plane mirror is erect or upright.

The image formed in a pinhole camera is an example of real image because it can be received on a screen. A real image is formed when light rays coming from an object actually meet a point after reflection from the mirror.

Here, are all the statements are correct. Hence, your answer will be option [D].

A shoe box can never form of circular shadow because in any condition it does not have a circular shape. However, a ball, a flat disc and the base of ice-cream cone can form a circular shadow.

Here, are all the statements are correct. Hence, your answer will be option [D].

Here, are all the statements are correct. Hence, your answer will be option [D].