Please enable JavaScript.
Coggle requires JavaScript to display documents.
LIGHT: REFLECTION AND REFRACTION, Size of the Image, 2, 1, 3, 5, 6, 7, 8,…
LIGHT: REFLECTION AND REFRACTION
What is LIGHT?
It is a
form of energy
which help us us to
see things
in its presence. It travels
undaviated
. The
plane
and
luminous
objects
reflect light
. The objects which
reflect large/most
amount of
light
are called
MIRRORS
.
MIRRORS
PLANE MIRROR
It's characteristics are
Height of the image is equal to height of the object (hi=ho)
object distance (u) = image distance (v)
the image is laterally inverted
The image is virtual and erect
The focal length is infinite
SPHERICAL MIRRORS
CONCAVE MIRROR
Images formed by Concave Mirror
Position of the Object
Position of the Image
Size of the Image
Nature of the Image
real and inverted
2 more items...
Highly diminished & point sized
diminished
1 more item...
At focus F
Between F and C
At C
1 more item...
At infinity
beyond C
At C
between C and F
1 more item...
4
CONVEX MIRROR
Image formations by Convex Mirror
Position of the Object
Position of the Image
Size of the Image
Nature of the Image
virtual and erect
2 more items...
Highly diminished, point sized
diminished
At focus F, behind the mirror
between P and F
At Infinity
between infinity and the pole P
REFLECTION OF LIGHT
Laws of reflection of light are
The angle of incidence (i) = angle of reflection (r)
The incident ray, the reflected ray and the normal to the mirror at the point of incidence all lie in the same plane.
Mirror Formula
1/v + 1/u = 1/f
Magnification Formula
m = h'/h = (-v)/u
REFRACTION
Refraction is the phenomenon of bending of light as it goes obliquely from one medium to another.
REFRACTIVE INDEX
It is a value which decides by what factor the light ray bends/changes its speed
Objects
Refractive Index
1
1.5
2.42
1.5
Air
Water
Diamond
Oil
SPHERICAL LENSES
CONVEX LENS (CONVERGING)
Position of the Object
Position of the Image
Size of the Image
Nature of the Image
real and inverted
real and inverted
2 more items...
highly diminished, point sized
diminished
same size
1 more item...
At F2
between F2 and 2F2
at 2F2
beyond 2F2
1 more item...
At infinity
beyond 2F1
at 2F1
between F1 and 2F1
at F1
1 more item...
CONCAVE LENS (DIVERGING)
Nature of the Image
virtual and erect
virtual and erect
Lens Formula
1/v - 1/u = 1/f
Magnification Formula
m = h'/h = v/u
Power of Lens
P = 1/f
Size of the Image
Position of The Image
at focus F1
between F1 and O
Position of the object
at Infinity
between infinity and O
highly diminished, point sized
diminished
2
1
3
5
6
7
8
9
10
11
