A student observes a tree given in figure through a pinhole camera. Which of the diagrams given in figure. (a) to (d) depicts the image seen by her correctly?

Which of the following is not always necessary to observe a shadow?

Bouncing back of ray of light from shining surface on which it was incident is known as

Shadows give us the information regarding the

Image formed by a pinhole camera is :

Image of sun through a pinhole camera can be seen as:

You will see the shortest shadow of yourself in sunlight__________.

________________is natural source of light.

Shadows are formed by _________________object.

__________________material passes light partially.

Never try to look_________________at the sun.

When we look into____________ mirror, our left hand looks like right hand. This process is called__________

Light helps us to__________________objects.

Light travels in a _________ line.

A shadow is formed when light falls on alan ________ object.

Name a living luminous source of light

Is shadow two dimensional or three dimensional?

What are transparent materials?

How does light travel?

What is reflection?

Mention the name of an object which partially allows the light to pass through it.

Shadow of flying aeroplane cannot be seen on the earth. Explain why.

Compare pinhole image with the shadow of some objects.

What do you understand by incandescent body?

Distinguish between transparent and translucent object

Can you think of creating a shape that would give a circular shadow, if held in one way and a rectangular shadow, if held in another way?

Differentiate between a shadow and an image.

Suggest any two means for the conversion of a transparent glass sheet into a translucent sheet.

Differentiate between a luminous and non-luminous objects.

Show an experiment which proves that light always travels in a straight line.