light

​Learning Objective: Students will be able to understand and explain......

​

Sources  of light

​Propagation of light

​Shadow

​

​Light is something that enables us to see. The things around us. We cannot see anything if there

​is not light.  Objects that give out light are called luminous objects. Objects that do not give out light are called non-luminous objects

Any objects that gives out light is called sources of light.

Luminous objects are also called sources of light.

​Sources of light can be natural or artificial. {man-made}

​Examples of natural sources of light are the sun and others stars

​and insects like firefly.

​are examples of opaque.

​A mirror is a very good

​example of an opaque

​object.

Transparent Object​

​

​Matireals that allow light to pass through significant scattering or

​absorptation are called transparent materials. We are able to see throughthese materials very cleerly.

​

 Eg: clear air, clear glass, cleen water, some kinds of plastic and cellophane paper.

​Usully light travels in a stright line.

​When we want to repreasent the propagtion of light with a diagram,

​we repreasent it with the help of rays and beams.

​Thank you all for participating in this lesson.