1.
Differentiate luminous and non luminous objects.
2.
State the properties of light.
3.
What is meant by refraction?
4.
State the first law of refraction oflight.
5.
State the second law of refraction (or)state
Snell’s law.
6.
Define dispersion of light.
7.
What is VIBGYOR?What
are the colours present in if?
8.
What is meant by scattering?
9.
What is elastic scattering?
10.
What is inelastic scattering?
11.
What is Rayleigh scattering?
12.
State Rayleigh scattering law.
13.
Why sky appears blue at noon?
14.
Why sun appears red at sunset or sunrise?
15.
Write note on Mie scattering
16.
Why does clouds appear white?
17.
What is Tyndall scattering?
18.
State Raman law of scattering of light.
19.
What is Rayleigh line?
20.
What are Raman lines?
21.
What are Stokes and Antistokes lines?
22.
What is a lens?state types.
23.
What iare the applications of convex lenses?
24.
What are the applications of concave lenses?
25.
What is lens formula?
26.
Write note of sign convention.
27.
Define magnification of lens.
28.
What is lens maker's formula?what is its
significance?
29.
What is power of a lens?Write formula and unit.
30.
Differentiate convex and concave lenses.
31.
State various parts of eye and their functions.
32.
Draw the diagram of eye and label the parts.
33.
What is meant by power of accomodation of eye?
34.
Define:Least diatance of distinct vision.
35.
Name the various defects of eye.
36.
What is myopia?state the reason,correcting
method for myopia.
37.
What is Hypermetropia?state the
reason,correcting method for hypermetropia.
38.
What is presbyopia?state the reason,correcting
method for presbyopia.
39.
What is astigmatism?state the reason,correcting method
for astigmatism.
40.
What are the uses of simple microscope?
41.
What are the advantages of Telescopes?
42.
What are the disadvantages of Telescopes?
43.
Luminous objects
|
Sun,Stars
|
Non luminous objects
|
Moon,
|
Speed of light in vacuum
|
3
× 108 ms–1
|
Second law of refraction
|
Snell’s
law
|
Snell’s law
|
sin i /sin r = µ2/ µ1
|
Rayleigh scattering law
|
‘S’ ∝ 1/
λ4
|
Mie
scattering explains
|
white
appearance of the clouds
|
Rayleigh’s scattering law explains
|
1.Sky
blue colour
2.Sun
appears red
|
Tyndall
Scattering
|
Scattering
in colloidal solutions
|
Lens
maker’s formula
|
|
Power
of a lens
|
|
Unit
of Power of a lens
|
Dioptre
|
Power
of a convex len
|
|
power
of a concave lens
|
Negative
|
Convex
Lens
|
thicker
in the middle than
at edges |
Convex
Lens
|
converging
lens.
|
Convex
Lens
|
produces
mostly real images
|
Convex
Lens
|
used
to treat hypermeteropia
|
Concave Lens
|
thinner in the
middle than
at edges. |
Concave Lens
|
diverging lens
|
Concave Lens
|
produces
virtual images
|
Concave Lens
|
used to treat
myopia.
|
Iris
|
controls
amount of light entering
|
Pupil
|
pathway for
the light to retina
|
Retina
|
on which real
and inverted image of objects is formed
|
Ciliary muscles
|
helps to
change the focal
length of the eye lens |
Eye Lens
|
convex in
nature.
|
Persistence of
vision
|
less than 0.1
second
|
Near point of
eye.
|
25 cm
|
far point of
the eye.
|
Infinity
|
Myopia
|
short
sightedness
|
Due to lengthening
of eye ball
|
|
focal length
of eye lens is reduced
|
|
image of
distant objects are formed before the retina
|
|
corrected
using a concave lens
|
|
Hypermeteropia
|
Long
sightedness,
|
due to the
shortening of
eye ball |
|
focal length
of eye lens is
increased |
|
image of
nearby objects are formed behind the retina
|
|
corrected
using a convex lens
|
|
Presbyopia
|
‘old age
hypermetropia’
|
eye loses its
power of accommodation
|
|
iliary muscles
become
weak and the eye-lens become rigid (infl exible) |
|
corrected by
‘bifocal lenses’.
|
|
Astigmatism
|
eye cannot see
parallel and
horizontal lines clearly |
imperfect
structure of
eye lens |
|
Due to
development of cataract
on the lens, ulceration of cornea, injury to the refracting surfaces, |
|
corrected by
using cylindrical lenses (Torrid
lenses)
|
|
Uses of Simple microscope
|
watch
repairers and jewellers
|
read small
letters clearly
|
|
observe parts
of flower, insects etc
|
|
bserve finger
prints in the field of forensic science
|