Class 6 Science Chapter 8 MCQ

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

We cannot see anything in detail through a translucent material. Clouds are also translucent objects. Though we cannot see the sun through clouds on a cloudy day but is still there is some sunlight all around. This is because being translucent, clouds allows some of the sunlight to pass through them due to which there is light on earth even on a cloudy day.

The moon is a non-luminous object which does not have its own light. But the sun is a luminous source of light. Actually, we can see the moon because it reflects sunlight into our eyes. In generally, when sunlight falls on the surface of moon, then some of the sunlight is reflected by the moon towards the earth. And to us it appears as if the light is being given out by the moon itself. But in reality, moonlight is the sunlight which is reflected from the surface of moon. Thus, moon behaves as a cold, non-luminous mirror. It is a reflector of sunlight.

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.

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. As the sun rises in the sky, the shadow of a building shortens.

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].

The image which cannot be obtained on a screen is called a virtual image. The virtual image is just an illusion. All the three are the characteristic of a virtual image formed in a plane mirror, except option [B]. The image formed in a plane mirror is erect image, not inverted image. Remember, the image in a plane mirror is laterally inverted or sideways reversed with respect to the object.

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.

As we know that due to the regular reflection of light by the smooth surface of a plane mirror, we can see an image of our face into the mirror. And when the light falling on different objects, the light is reflected back or scattered by these objects (having rough surfaces) in all direction, and we can see the objects. This is called a diffuse reflection or irregular reflection.

The bird of obstructs the sunlight to form shadow on the nearby ground. But when the same bird is flying high up in the air, even then the bird of obstructs the sunlight falling on it but its shadow is not seen on the ground because the ground is very, very far below the bird.

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

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

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

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

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.

The table top must be made of glass sheet because only a glass sheet can show the images of both the students, which can be seen by both of them.

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].