- Introduction
- Rest time! Have fun
- Physics
- Chemistry
- BIOLOGY
- Reaching the age of Adolescence
- CROP PRODUCTION AND MANAGMENT
- Cells : The basic structural unit of life
- Nutrition in human beigns
- RESPIRATION IN HUMAN BEIGNS
- TRANSPORTATION IN HUMAN BEIGNS
- excretory system in human beigns
- NERVOUS SYSTEM
- PHOTOSYNTHESIS
- Respiration in plants
- REPRODUCTION IN PLANTS
- MOVEMENTS IN PLANTS
- Forest our lifeline
- WASTE WATER STORY
- WEATHER,CLIMATE AND ITS ADAPTATION .
- Reaching the age of Adolescence
- Model tests
- Animation time
LIGHT
LIGHT -
LIGHT IS A INVISIBLE ENERGY WHICH CAUSES SENSATION OF VISION IN US .
IT TRAVELS IN STRAIGHT LINE .
RAY -
THE DIRECTION OF THE PATH IN WHICH LIGHT IS TRAVELLING IS CALLED RAY .
BEAM -
A BEAM IS A STREAM OF LIGHT AND IS SHOWN BY NUMBER OF RAYS .
TYPES OF BEAMS
THERE ARE MAINLY THREE TYPES OF BEAMS -
1) PARALLEL BEAM - WHEN THE RAYS OF LIGHT TRAVEL PARALLEL TO EACH OTHER , THEN THE COLLECTION OF SUCH RAYS IS CALLED PARALLEL BEAM .
2)DIVERGENT BEAM - WHEN THE RAYS OF LIGHT START FROM A POINT AND TRAVEL IN VARIOUS DIRECTION ,THEN THE COLLECTION OF SUCH RAYS ARE CALLED DIVERGENT BEAM .
3)CONVERGENT BEAM - WHEN THE RAYS OF LIGHT COMING FROM DIFFERENT DIRECTION MEET AT A POINT ,THEN THE COLLECTION OF SUCH RAYS IS CALLED CONVERGENT BEAM .
LIGHT IS AN INVENSIBLE ENERGY PRODUCED BY BULB. ITS SPEED IS 3 * 1000000000 m/s
REFLECTION OF LIGHT
THE MIRROR CHANGES THE DIRECTION OF LIGHT . THE CHANGE OF DIRECTION BY A MIRROR IS CALLED REFLECTION OF LIGHT .
IMAGE
THE OBJECT WHICH APPEARS BEHIND THE MIRROR IS CALLED AS IMAGE. THERE ARE TWO TYPES OF IMAGES
1 REAL IMAGE
2 VIRTUAL IMAGE
REAL IMAGE
AN IMAGE WHICH CAN BE OBTAINED ON SCREEN IS CALLED AS REAL IMAGE.
REAL IMAGES ARE ALWAYS ERECT .
VIRTUAL IMAGES
AN IMAGE WHICH CANNAOT BE OBTAINED ON SCREEN IS CALLED VIRTUAL IMAGE .
MIRROR
ANY POLISHED OR SHINING SURFACE ACT AS A MIRROR . THERE ARE THREE TYPES OF MIRROR
1.PLANE MIRROR
2.CONCAVE MIRROR
3.CONVEX MIRROR
PLANE MIRROR
A PLANE MIRROR FORMS REAL IMAGE AND IS ERECT .
IT IS OF THE SAME SIZE AND IT IS SAME DISTANCE FROM MIRROR AS THE OBJECT IS IN FRONT OF IT .
WE CAN ALSO SEE RIGHT SIDE TO LEFT SIDE AND LEFT SIDE TO RIGHT SIDE THIS IS LATERAL INVERSION .
CONCAVE MIRROR
A CONCAVE MIRROR CAN FORM REAL AND INVERTED IMAGE .
WHEN THE OBJECT IS PLACED VERY CLOSED TO MIRROR THE IMAGE FORMED IS VIRTUAL , ERECT AND MAGNEFIED .
USES OF CONCAVE MIRROR
CONCAVE MIRRORS ARE USED FOR MANY PURPOSES DOCTORS USE CONCAVE MIRRORS FOR EXAMINING EYES, EARS , NOSE AND THROAT .
CONCAVE MIRRORS ARE USED BY DENTISTS TO SEE AN ENLARGED IMAGE OF TEETH.
THE REFLECTORS OF TORCHES, HEADLIGHTS OF CARS AND SCOTERS ARE CONCAVE IN SHAPE.
CONVEX MIRROR
IMAGE FORMED BY A CONVEX MIRROR IS ERECT, VIRTUAL AND SMALLER IN SIZE THAN THE OBJECT .
Lenses
The magnifying glass is actually a type of lense.
LENSES ARE WIDELY USED IN SPECTACLES TELESCOPES AND MICROSCOPES .
TYPES OF LENSES
THERE ARE TWO TYPES OF LENSES
1.CONCAVE LENSE
2.CONVEX LENSE
CONCAVE LENS
THE LENSES WHICH FEEL THINNER IN THE MIDDLE THAN AT THE EDGES ARE CONCAVE LENSES .
A CONCAVE LENS ALWAYS FORMS ERECT, VIRTUAL AND SMALLER IMAGE THAN THE OBJECT .
composition OF WHITE LIGHT
WHITE LIGHT IS COMPOSED OF SEVEN COLOURS THEY ARE VIOLET , INDIGO , BLUE , GREEN , YELLOW , ORANGE , RED.
LIGHT IS A INVISIBLE ENERGY WHICH CAUSES SENSATION OF VISION IN US .
IT TRAVELS IN STRAIGHT LINE .
RAY -
THE DIRECTION OF THE PATH IN WHICH LIGHT IS TRAVELLING IS CALLED RAY .
BEAM -
A BEAM IS A STREAM OF LIGHT AND IS SHOWN BY NUMBER OF RAYS .
TYPES OF BEAMS
THERE ARE MAINLY THREE TYPES OF BEAMS -
1) PARALLEL BEAM - WHEN THE RAYS OF LIGHT TRAVEL PARALLEL TO EACH OTHER , THEN THE COLLECTION OF SUCH RAYS IS CALLED PARALLEL BEAM .
2)DIVERGENT BEAM - WHEN THE RAYS OF LIGHT START FROM A POINT AND TRAVEL IN VARIOUS DIRECTION ,THEN THE COLLECTION OF SUCH RAYS ARE CALLED DIVERGENT BEAM .
3)CONVERGENT BEAM - WHEN THE RAYS OF LIGHT COMING FROM DIFFERENT DIRECTION MEET AT A POINT ,THEN THE COLLECTION OF SUCH RAYS IS CALLED CONVERGENT BEAM .
LIGHT IS AN INVENSIBLE ENERGY PRODUCED BY BULB. ITS SPEED IS 3 * 1000000000 m/s
REFLECTION OF LIGHT
THE MIRROR CHANGES THE DIRECTION OF LIGHT . THE CHANGE OF DIRECTION BY A MIRROR IS CALLED REFLECTION OF LIGHT .
IMAGE
THE OBJECT WHICH APPEARS BEHIND THE MIRROR IS CALLED AS IMAGE. THERE ARE TWO TYPES OF IMAGES
1 REAL IMAGE
2 VIRTUAL IMAGE
REAL IMAGE
AN IMAGE WHICH CAN BE OBTAINED ON SCREEN IS CALLED AS REAL IMAGE.
REAL IMAGES ARE ALWAYS ERECT .
VIRTUAL IMAGES
AN IMAGE WHICH CANNAOT BE OBTAINED ON SCREEN IS CALLED VIRTUAL IMAGE .
MIRROR
ANY POLISHED OR SHINING SURFACE ACT AS A MIRROR . THERE ARE THREE TYPES OF MIRROR
1.PLANE MIRROR
2.CONCAVE MIRROR
3.CONVEX MIRROR
PLANE MIRROR
A PLANE MIRROR FORMS REAL IMAGE AND IS ERECT .
IT IS OF THE SAME SIZE AND IT IS SAME DISTANCE FROM MIRROR AS THE OBJECT IS IN FRONT OF IT .
WE CAN ALSO SEE RIGHT SIDE TO LEFT SIDE AND LEFT SIDE TO RIGHT SIDE THIS IS LATERAL INVERSION .
CONCAVE MIRROR
A CONCAVE MIRROR CAN FORM REAL AND INVERTED IMAGE .
WHEN THE OBJECT IS PLACED VERY CLOSED TO MIRROR THE IMAGE FORMED IS VIRTUAL , ERECT AND MAGNEFIED .
USES OF CONCAVE MIRROR
CONCAVE MIRRORS ARE USED FOR MANY PURPOSES DOCTORS USE CONCAVE MIRRORS FOR EXAMINING EYES, EARS , NOSE AND THROAT .
CONCAVE MIRRORS ARE USED BY DENTISTS TO SEE AN ENLARGED IMAGE OF TEETH.
THE REFLECTORS OF TORCHES, HEADLIGHTS OF CARS AND SCOTERS ARE CONCAVE IN SHAPE.
CONVEX MIRROR
IMAGE FORMED BY A CONVEX MIRROR IS ERECT, VIRTUAL AND SMALLER IN SIZE THAN THE OBJECT .
Lenses
The magnifying glass is actually a type of lense.
LENSES ARE WIDELY USED IN SPECTACLES TELESCOPES AND MICROSCOPES .
TYPES OF LENSES
THERE ARE TWO TYPES OF LENSES
1.CONCAVE LENSE
2.CONVEX LENSE
CONCAVE LENS
THE LENSES WHICH FEEL THINNER IN THE MIDDLE THAN AT THE EDGES ARE CONCAVE LENSES .
A CONCAVE LENS ALWAYS FORMS ERECT, VIRTUAL AND SMALLER IMAGE THAN THE OBJECT .
composition OF WHITE LIGHT
WHITE LIGHT IS COMPOSED OF SEVEN COLOURS THEY ARE VIOLET , INDIGO , BLUE , GREEN , YELLOW , ORANGE , RED.