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 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.

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

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.

When we are able to see through an object clearly it is allowing all the light to pass through it and hence it is called transparent object.

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.

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.

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.

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

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.

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.

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.

Both the size and shape of the shadow of the tree will be changed because at 8 a.m. and 3 p.m., the length of the shadows of free will be longer than its actual length and point to the west and the east directions, respectively. However, at 12 noon, the sun will be high in the sky just above the tree, so the shadow of tree will be shot.

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].