Light - Transparent, Translucent, Opaque Objects
Transcript
00:00hi kids today we will learn more about light energy so let's get started kids
00:09we learned that we see any object because of the light that hits on it
00:15reflects back and that reflected light makes us see that object so let's learn
00:23more about it does all the light hitting an object reflect back or some of it
00:30let's learn actually not all light is reflected back some of it is absorbed by
00:37the object here is an example if we strike light on a solid object say a bag
00:47the light hitting the bag will not pass through it it will be absorbed by the
00:53bag as it's a solid object very little amount of light will pass through them
00:59this is why solid objects cast shadows as light is not able to pass through
01:06them the area exactly behind the bag is darker as light is not able to pass
01:14through the bag and this is what we call as shadow transparent objects
01:22objects that let all the light to pass through them are called transparent
01:28objects or clear objects like any clear glass or clear plastic example window
01:39panes spectacles car windshields light bulb thermometer aquarium transparency
01:52sheets ice and clean water are examples of transparent things you can see the
02:03details of the objects on the other side of the transparent objects it is because
02:09all the light passes through
02:15translucent objects translucent objects allow some light to pass through them
02:23but not all light some light is absorbed or reflected
02:31it can be seen through but not completely tinted windows frosted glass
02:40sunglasses wax papers color liquids in a glass oil papers colored syrups and
02:51certain stones are examples of translucent objects opaque objects
03:00objects that do not let any light to pass through them are called opaque
03:06objects some of the light is reflected back and some is absorbed here are some
03:13examples of opaque objects now let's see another interesting thing do you know
03:23light consists of seven colors we can see the seven colors of light using a
03:30prism when we allow a beam of white light to pass through a glass prism the
03:38white light splits into seven colors and we see a beautiful band of seven
03:44colors like a rainbow the seven colors are violet indigo blue green yellow
03:53orange red in short you can say vigor these are the seven colors that light is
04:03made up of you often see white light splitting into seven colors in a rainbow
04:09to whenever light falls on an object for instance the red object all other colors
04:18of the light are absorbed by the object and only the red color portion of the
04:23light is reflected back and that is why the object appears red to us if an
04:32object is green it will absorb all the other colors except for green and green
04:39color is reflected because of which it appears green to us why color objects
04:46reflects all the light or all colors of the light and absorbs none that's why
04:53they appear white black color objects absorbs all light or all colors of the
05:01light and reflects none and so appears black because black absorbs all colors
05:11or all light black clothes makes us feel hot in the Sun as they absorb more light
05:19and white color clothes makes us feel better when it's sunny outside as they
05:26reflect all the light and absorbs none this is why we should wear white and
05:33light color clothes when it's hot outside and dark color clothes when it's
05:40cold outside so kids today we learned how divert types of objects absorbs and
05:48reflects different amounts of light now you may go ahead and take a quiz to
05:53learn more bye-bye