NCERT Ch-11 Light,Shadows and Reflections

What is a Luminous object?

• if we cannot see through the object it is called luminous object

• if we can see the object but not clearly it is called luminous object

• if a object emits light of its own it is called luminous object

What is a Shadow?

• It is a reflection of an object

• It is a dark patch

• It is a dark area where light is blocked by a opaque object

How does light pass

• in a pattern

• in a circle

• in a straight line

What is a Reflection?

• A image produced by a object Example: water

• A image produced by a luminous object Example: Sun

• A image produced by a opaque object Example: orange

What is a Opaque object?

• Object that do not let light pass though are called opaque objects

• Objects that let light pass though is called opaque objects

• Objects which we can see but not very clearly

(Please write the first letter in capital) __________ give information about shapes of a object

(Please write the first letter in capital) A chair is a example for ___________ object

What is a pinhole camera?

• A pinhole camera is in the shape of a box.

• A pinhole camera is a camera with lens

• A pinhole camera is a simple camera, without lens, in the shape of a box.

Can a rock be classified as a luminous object?

• True

• False

If we stand in a completely dark room, will we be able to see a reflection in a mirror?

• Yes

• No