Two students while sitting across a table looked down onto its top surface. They noticed that they could see their own and each other's image. The table top is likely to be made of

Which of the following is a transparent object?

 Which one of the following is the natural source of light?

 The objects which partially allow the light to pass through it are called 

Shadow of an object is always seen in

Pinhole camera forms_____________ image.

Shadows are formed by _________________object.

Reflection of mirror gives us_____________images.

Shadows are______________ from images.

Light helps us to__________________objects.

Moon is luminous.

Light is not a form of energy.

Mirror does not change the direction of light falls

Lateral inversion is a phenomenon of changing left to right and vice-versa.

Images are similar to shadows.

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

Through which pipe, we can see the candle, straight pipe or curved pipe?

Briefly state that what a dark part of shadow is called as.

In respect to the direction of source of light, what is the direction of shadow?

Name the things other than source of light and opaque object required to see the shadow.

Three identical towels of red, blue and green colour are hanging on a cloth line in the sun. What would be the colour of shadows of these towels?

A student covered a torch with red cellophane sheet to obtain red light. Using the red light, she obtains a shadow of an opaque object. She repeats this activity with green and blue light. Will the colour of the light affect the shadow? Explain.

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

Differentiate between a luminous and non-luminous objects.

Three torches A, Band C shown in figure are switched ON one by one. The light from which of the torches will not form a shadow of the ball on the screen?

A student had a ball, a screen and a torch in working condition. He tried to form a shadow of the ball on the screen by placing them at different positions. Sometimes,1he shadow was not obtained. Explain.

A football match is being played at night in a stadium with flood lights ON. You can see the shadow of a football kept at the ground but cannot see its shadow when it is kicked high in the air. Explain.