Balbharati solutions for जनरल सायन्स इंटेगरटेड [इंग्रजी] इयत्ता ६ महाराष्ट्र राज्य मंडळ chapter 14 - Light and the Formation of Shadows [Latest edition]

Can we see anything in total darkness?

What helps us to see the objects around us?

What does the light in each one of the pictures originate from?

Make a list of some luminous objects and substances and classify them into natural and artificial sources of light.

Take a straight tube that can be bent easily. As shown in the figure, place a burning candle on a stand, and look at it through the tube. Then bend the tube and look at the candle again. What do you see?

In which step is the flame of the candle seen clearly? Why?

In which objects do we see a reflection?

What is the difference between an object and its reflection? What causes the difference?

You may have seen your image formed on surfaces such as a new steel dish, the glossy granite cladding of a wall and the still water in a lake. Make a list of other similar surfaces. Compare the images seen in them. Make a guess about the property of a surface due to which an image is formed. Discuss this with your teachers and parents.

Stand in front of a plane mirror and look at your image in it.

1. Raise your right hand. Which hand of the mirror image is raised? 
2. What change do you see in the image if you decrease or increase your distance from the mirror? 
3. Is there any difference between your height and the height of the mirror image?

How will you light up a dark room using reflected light?

Try to start the TV by operating the remote control from behind it.

Why is the image on the diaphragm of the pinhole camera inverted?

What difference do you notice on looking through the windows in the picture? What causes the difference?

The picture shows transparent, opaque, and translucent window panes. Spot them. Depending on the nature of the window pane, we may or may not see the objects on the other side through it.

Take an electric torch. Flash its light on a wall. Now make your friend stand in between the torch and the wall. What happens?

Compare the objects in your environment with the shadows they form.

Use your hands and feet to make different shadow shapes of birds, animals, etc.

Apparatus: A glass, water, a large white sheet of paper 

Place a glass filled with water on a sheet of paper in the window so that it receives direct sunlight. What is seen on the paper?

Can we do the same in a dark room with the help of a prism and a torch? What do we learn from this? 

Apparatus – Soap water, a small loop of wire.

If you dip the wire loop in the soap water and then blow on it, soap bubbles are formed. The beautiful colours of the rainbow are seen in these bubbles.

What do you see on holding a CD in the sun?

A ______ is a natural source of light.

A ______ is an artificial source of light.

When light passes through a prism, it gets separated into ______ colours.

The image obtained in the pinhole camera is ______.

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

When a ______ object comes in the way of light, light passes ______ it.

Write whether of the following objects are luminous or non-luminous.

Match the following.

What things are necessary for the formation of a shadow?

When can an object be seen?

What is a shadow?

Prepare a Newton's disc.

Find out how to save electricity with the help of the sunlight we receive during the day.

Read a biography of Sir C. V. Raman and find out about the discoveries he made.