Class 6 Science Chapter 8 MCQ

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.

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].

Flower is a non-luminous object. It does not give its own light. We can see a flower because it reflects sunlight falling on it into our eyes. The flower reflects some of the sunlight falling on it in all direction, not only towards our eyes.

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.

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.

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.

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.

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.

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 materials. 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.

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].

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].

Real images can be formed by a curved mirror known as concave mirror. And a concave mirror can form a virtual image only, when the object is very close to it.

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].