HUMAN EYE AND COLOURFUL WORLD WITH BRIEF EXPLAINATION

2. NAME- NAGARAJ
ROLL NO- 64
SUBJECT- ICT
TOPIC- HUMAN EYE AND COLOURFUL WORLD

4. HUMAN EYE

5. HUMAN EYE
 The Human eye is like a camera.
 Its lens system forms an image on a light –
sensitive screen called the retina.
 Light enter the eye through a thin membrane
called the cornea.
 Its forms the transparent bulge on the front
surface of the eyeball.

6. DEFECTS OF VISION AND THEIR CORRECTION
A. MYOPIA
 Myopia is also known
as near –sightedness.
 A person with myopia
can see nearby objects
clearly but can’t see
distance object
distinctly
 For correcting myopia
eye concave lens is
used.

7. B. HYPERMETROPIA
 Hypermetropia is
alsoknown as far-
sightedness.
 A person with
hypermetropia can
see distance objects
clearly but can’t see
nearby object
distinctly.
 For correcting
hypermetropia eye
convex lens is used.

8. C. PRESBYOPIA
 The power of
accommmodation of
the eye usually
decreases with
ageing.
 For most people, the
near point gradually
recedes away ,they
find it difficult to see
nearby objects
comfortably and
distinctly without

9. DISPERSION WHITE LIGHT BY A GLASS PRISM
The prism
has probably
split the
incident
white light in
to a band of
colours.

10. VIBGYOR

11. TYNDALL EFFECT
The
phenomenon
of scattering
of light by
collidal
particles
gives rise to
tyndall effect.