We can see the sun because the light given out by sun enters our eyes. The sun, stars, electric bulb, glowing tube-light, torch, fire, and flame of a burning candle, are all luminous objects. They produce their own light and then emit this light. The luminous objects are the sources of light. The objects which emit their own light are called luminous objects. There are two types of objects: (1) Luminous Objects (2) Non-luminous Objects Luminous Objects and Non-Luminous Objects 4.2 Diffuse Reflection or irregular Reflection.4 Regular Reflection and Diffuse Reflection of Light.1 Luminous Objects and Non-Luminous Objects.It is light which makes things visible to us. Light enables us to see things from which it comes or from which it is reflected. As soon as light from a torch, an electric bulb, a tube-light falls on the object, we are able to see it clearly even in a dark room or in the darkness of night. We need a source of light to make the objects visible. Question 14 Why a book lying on a table in a room can be seen from all parts of the room? Question 13 What is the difference between a regular reflection and an irregular reflection? Question 12 State two laws of reflection? Question 11 How we are able to see the moon? Question 10 What makes things visible to us? Question 9 What type of reflection takes place from a smooth surface and a rough surface? Question 8 Define the angle of reflection? Question 7 Define the angle of incidence? Question 6 What do you mean by point of incidence? Question 5 What is meant by reflected ray? Question 4 What is meant by incident ray? Question 3 Define the term reflection of light? Question 2 What is meant by non-luminous objects? Give example? Question 1 What is meant by luminous object? Give example?
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |