Science [1 Marks Each] M.C.Q.

A colored plastic bottle is an opaque material. When a light beam is incident on it, a shadow will form on the screen can easily pass through the transparent material.

Here, are all the statements are correct. Hence, your answer will be

Inverted

The bodies which have its own source of energy to emit light are called luminous bodies. Example: Stars, burning candle, sun, etc.
The bodies which are not able to emit light but are visible only when they reflect light produced by the luminous objects are called non-luminous bodies. Example: earth, blackboard, moon.

An object is visible, when it either absorbs light or reflects light. Air is not visible because it neither absorbs nor reflects light.

Shoe box will not form a circular shadow as it is rectangular in shape and hence will form a non-circular shadow.

Images are not similar to shadows.

They are parallel to one another.

An opaque object is required to produce a shadow.

Virtual image.

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.

Albert Einstein

A shadow is formed when an opaque object comes in the way of light.

It is always erect.

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

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.

Light energy.

Sometimes a shadow can mislead us

Ray.

Full moon.

None of these.

A mirror is kept at position A to get a patch of light because only a mirror can change the direction of light that falls on it, i.e. causes reflection.

A thin sheet of paper is transparent.

Transparent.

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.

Transparent

A piece of wood is opaque and can cast a shadow.

To see the entire length of your body reflected in the mirror, you should use a mirror whose height will allow you to see your full image.

Transparent material allows light to pass through it and opaque object obstructs it.

All the above.

The reflection will be irregular reflection.

Distance between object and image becomes double the distance between object and mirror.

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.

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.

Wood.

Opaque.

Tube-light.

Chair is an opaque object. Opaque objects completely stop light from passing through them. When light falls on a wooden chair, a part of the light gets reflected from the chair and enters our eyes.

Real and inverted image is formed on the retina.

​​​​​​A rectangular box

A black wallet absorbs most of the light.

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.

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.