Light is a very common topic to make a presentation on. i hope my ppt will help you all. If you need more help, follow me on Google Plus : bobbysz182@gmail.com. Or follow me on twitter.

7. science

8. T H E C H A N G E I N D I R E C T I O N O F A WAV E , S U C H
A S A L I G H T O R S O U N D WAV E , AWAY F R O M A
B O U N D A RY T H E WAV E
E N C O U N T E R S . R E F L E C T E D WAV E S R E M A I N I N
T H E I R O R I G I N A L M E D I U M R AT H E R T H A N
E N T E R I N G T H E M E D I U M T H E Y E N C O U N T E R .

10. I. ANGLE OF INCIDENCE =
ANGLE OF REFLECTION
In other words, light gets reflected from a
surface at the same angle it hits it.

11. 2 . I N C I D E N T R A Y , R E F L E C T E D R A Y A N D T H E
N O R M A L D R A W N A T T H E P O I N T O F
I N C I D E N C E T O T H E R E F L E C T I N G
S U R F A C E , L I E I N T H E S A M E P L A C E .

12. S M O O T H , S H I N Y S U R F A C E S
H A V E A C L E A R
R E F L E C T I O N .
Rough, dull surfaces
have a diffuse reflection.
Diffuse reflection is
when light is scattered in
different directions

14. SHADOW

15. LOU S

16. R E D
O R A N G E
Y E L L O W
G R E E N
B L U E
I N D I G O
V I O L E T

18. EYES ARE THE SENSE ORGANS WHICH
GIVE US THE SENSE OF VISION. THE
HUMAN EYE IS ALMOST SPHERICAL IN
SHAPE. FOLLOWING ARE THE MAIN
STRUCTURES IN THE HUMAN EYE.

19. •C O R N E A : T H E E Y E B A L L I S C O V E R E D W I T H
A T O U G H L A Y E R . T H I S L A Y E R I S
T R A N S P A R E N T O N T H E F R O N T . T H I S
T R A N S P A R E N T P O R T I O N I S C A L L E D
C O R N E A .
•I R I S H : I R I S H I S A T H I N C I R C U L A R
S T R U C T U R E . I T W O R K S L I K E T H E S H U T T E R
O F A C A M E R A . I T C O N T R O L S T H E A M O U N T
O F L I G H T E N T E R I N G T H E E Y E . T H E C O L O R
O F I R I S I M P A R T S D I S T I N C T C O L O R T O T H E
E Y E S O F A N I N D I V I D U A L . A P E R S O N W I T H
B L U E I R I S H A S B L U E E Y E S .
•P U P I L : T H E R E I S A H O L E I N T H E C E N T R E
O F I R I S . T H I S I S C A L L E D P U P I L . L I G H T
E N T E R S T H E E Y E T H R O U G H T H E P U P I L .
W H E N T H E L I G H T I S B R I G H T , I R I S
C O N T R A C T S A N D T H U S A L L O W S L E S S L I G H T
I N T O T H E E Y E . W H E N T H E L I G H T I S D I M ,
I R I S D I L A T E S A N D T H U S A L L O W S M O R E
L I G H T I N T O T H E E Y E .
•L E N S : L E N S I S P R E S E N T B E H I N D T H E
P U P I L . T H E L E N S I N T H E H U M A N E Y E I S A
C O N V E X L E N S . T H E S I Z E A N D T H I C K N E S S
O F T H E L E N S C H A N G E A S P E R T H E
D I S T A N C E O F A N O B J E C T .

20. •RETINA: RETINA IS AT THE
BACK OF THE EYE AND MARKS
THE INNER LAYER OF THE
EYEBALL. IMAGES ARE
FORMED ON THE RETINA AND
THUS IT WORKS LIKE A
SCREEN. THERE ARE
PHOTOSENSITIVE CELLS IN
THE RETINA. THESE CELLS
ARE OF TWO TYPES, WHICH
ARE AS FOLLOWS:
•CONE CELLS: THE CONE CELLS
ARE SENSITIVE TO BRIGHT
LIGHT. THEY ALSO GIVE THE
SENSE OF COLOR.
•ROD CELLS: THE ROD CELLS
ARE SENSITIVE TO DIM LIGHT.
•OPTIC NERVE: THE OPTIC

21. A N I M A G E S T A Y S O N T H E R E T I N A F O R
A B O U T 1 / 1 6 O F A S E C O N D . T H I S F E A T U R E I S
C A L L E D P E R S I S T E N C E O F V I S I O N . D U E T O
T H I S , W H E N M A N Y S T I L L I M A G E S A R E
S H O W N I N A S E Q U E N C E ; T H E Y G I V E T H E
I L L U S I O N O F M O V I N G I M A G E S . M O V I E S A N D
A N I M A T I O N A R E M A D E B Y E X P L O I T I N G T H I S
P R O P E R T Y O F T H E H U M A N E Y E .