Only I
Only II
Both I and II
Neither I nor II
Column I | Column II | ||
---|---|---|---|
(A) | Short sight or myopia | (1) | Cylindrical lens |
(B) | Long sight or hypermetropia | (2 ) | Bifocal lens |
(C) | Presbyopia | (3) | Convex lens |
(D) | Astigmatism | (4) | Concave lens |
4321
3421
4231
3214
Only IV
I, II and Ill
All of these
Both II and Ill
Both Il and IV
I, II and Ill
II, Ill and IV
Both I and Ill
Both I and Ill
Both I and IV
I, Ill and IV
II, Ill and IV
Both I and Ill
Both I and IV
I, Ill and IV
II, Ill and IV
Both II and Ill
Both I and II
All of these
Both I and Ill
Plane mirror
Concave lens
Concave mirror
Convex mirror
`d= f_1 + f_2`
`d < f_1 + f_2`
`d > f_1 + f_2`
`d ge f_1 + f_2`
1000 wavelength
1500 wavelength
2500 wavelength
3000 wavelength
concave for case (i) and convex for case (ii)
convex for case (i) and concave for case (ii)
concave for both cases
convex for both cases
`10^o , 20^o`
`15^o, 15^o`
`15^o , 30^o`
`15^o , 60^o`
5
6
10
4
Concave lens
Convex lens
Convex lens
Prismatic lens
cylindrical lens
bifocal lens
contact lens
None of these
conjunctiva
ciliary body
fovea centralis
vitreous humour
It is a convex lens with variable focal length and at a fixed distance between the retina and the lens
It is a convex lens with variable focal length and its distance from the retina
It is a convex lens of constant focal length at a fixed distance from the retina
It is a concave lens of adjustable focal length at a fixed distance from the retina
the change in the convexity of the lens through ciliary muscles
changing in the refractive index of the eye fluid
changing curvature of retina
to and from movement of the eye lens
greater resolution
greater magnification
reducing lens aberration
ease of manufacture
retina
ciliary muscles
choroid
vitreous humour
A simple magnifier
Movie projector
An ordinary single lens reflex camera
None of the above
less than the wavelength used
equal to the wavelength used
atleast four times the wavelength used
three times the wavelength used
increasing the diameter of the objective
reducing the focal length of eyepiece
reducing focal length of the objective
increase tho diameter of eyepiece
concave lens
concave convex lens
plano-convex lens
convex lens
diverging lens
plane glass
convergent lens
optical axis
nodal planes
principal focii
optical centre
optional axis
coma
spherical aberration
chromatic aberration
distortion
magnified
three-dimensional
three-dimensional in appearance
coloured
no regular pattern is observed
red on the inner edge and violet on the outer edge
red on the outer edge and violet on the inner edge
None of the above
4 micron
0.4 micron
0.04 micron
0.004 micron
Green
Yellow
Blue
Red
they emit energy
of diffraction
of refraction
of reflection
density of glass is higher than that of air
they cannot be reflected from a glass surface
glass absorbs energy from the light rays
speed of light in glass is less than the !;peed of light in air
blue
red
white
black
Amplitude
Velocity
Wavelength
Frequency
have its size reduced to half
disappear
have its intensity reduced to half
None of the above
absorption as well as scattering of light from the mirrors
scatering of light by the atmosphere
absorption of light by the atmosphere
None of the above
2.66
2
1.125
0.88
diamond, glass, water
glass, diamond, water
diamond, water, glass
water, glass, diamond
frequency and wavelength
frequency and speed
wavelength and speed
frequency, wavelength and speed
Glass, water, diamond
Water, diamond, glass
Diamond, water, glass
Diamond. glass, water
1 km/h
2 km/h
4 km/h
8 km/h
differential scattering of sunlight by the atmosphere
total internal reflection of the sunlight by the atmosphere
absorption of sunliqht
refraction of sunlight by the atmosphere
greater than `mu`
equal to `mu`
less than `mu`
equal to unity
refraction
scattering
reflection
diffraction
be reduced
be increased
remain unchanged
change sign
Only reflection
Only refraction
Both reflection and refraction
Both reflection and interference
`3:4`
`4 : 3`
`8 : 7`
`8:9`
Magnification increases with the increase in focal length of eyepiece.
Magnification increases with the crease in focal length of objective.
Magnification does. not depend open the focal length of eyepiece.
Magnification decreases with the increase length of eyepiece.
List I(Disease) | List II(Remedy) | ||
---|---|---|---|
(A) | Hypermetropia | (1) | Concave lens |
(B) | Presbyopia | (2) | Bifocal lens |
(C) | Myopia | (3) | Surgery |
(D) | Cataract | (4) | Convex lens |
`A -> 4, B -> 2 , C -> 1, D -> 3`
`A -> 4, B -> 1 , C -> 2, D -> 3`
`A -> 3, B -> 1 , C -> 2, D -> 3`
`A -> 3, B -> 2 , C -> 1, D -> 4`
`+7·5 D`
` - 7.5 D`
`+2.5 D`
`+ 5.0 D`
Reflection
Interference
Dispersion
Total internal reflection
Concave lens
Convex lens
Cylinderical lens
Prismatic lens
Cables
Microwaves
Radio waves
Optical fibres
Assertion : A person stands at a distance of 1 m in front of a concave mirror. If the radius of curvature of the mirror is 4 m, the image of the person lies at a distance 2 m behind the mirror.
Reason : The general mirror equation confirms the location of the image from the mirror and it could be a real image.
Assertion : A test tube is filled up with 1/4 of its volume with water and immersed in a glass of water. The upper portion of the test tube looks bright.
Reason : This is due to dispersion of light.
Assertion : A test tube is filled up with 1/4 of its volume with water and immersed in a glass of water. The upper portion of the test tube looks bright
Reason : This is due to dispersion of light.
greater resolution
greater magnification
reducing lens aberration
ease of manufacture
Wavelength. frequency and velocity
Velocity and frequency only
Wavelength and frequency only
Wavelength and velocity only
`D/f`
`1+(D/f)`
`1+{(D+f)/f}`
`1+{(D+d)/f}`
`-0.8 D`
`-3.0 D`
`+0.8 D`
`+3.0 D`
Only 1
Only 2
Both 1 and 2
Neither 1 nor 2
Atmospheric reflection
Atmospheric dispersion
Atmospheric diffraction
Atmospheric refraction
Smaller than air
Greater than both air and water
Greater than air but lesser than water
Almost equal to water
1 and 4
3 and 4
2 and 3
1 and 2
Concave lens of 20 cm local length
Convex lens of 20 crn focal length
Concave lens of 5 crn focal length
Convex lens of 5 crn focal length
Only 1
Only 2
Both 1 and 2
Neither 1 nor 2
1.0
1.33
1.414
1.6
40 cm from the mirror
45 cm from the mirror
50 cm from the mirror
55 cm from the mirror
focal length of the eye lens
object distance from the eye lens
radii of curvature of the eye lens
image distance from the eye lens
`15 cm`
`16 cm`
`18 cm`
`20 cm`
Hubble telescope
Kepler telescope
Copernicus telescope
Newton telescope
Virtual, not magnified
Virtual, magnified
Real, not magnified
Real, magnified
reflection of light
refraction of light
total internal reflection of light
interference of light
is zero
is infinity
can be anywhere between zero and infinity
None of the above
at the principal focus
between the principal focus and the centre of curvature
at the centre of curvature
beyond the centre of curvature
a microscope
a telescope
both microscope and telescope
neither microscope nor telescope
`180^o`
`90^o`
`45^o`
`0^o`
atmospheric refraction
dispersion of light
total internal reflection
diffraction of light
converging lens
diverging lens
plano-converging lens
plano-diverging lens
wavelength remains same
frequency remains same
frequency increases
wavelength increases
refractive index of air is less than that of glass
refractive index of air is greater than that of glass
density of glass is greater than that of air
density of glass is less than that of air
0.50 m
2 m
Half of your height
Twice your height
Air turbulence of earth's atmosphere
Poor optical polish achievable on large mirrors
Poor tracking capacities of telescopes
Varying density of air in the Earth's atmosphere
diffraction of light
refraction of light
polarisation of light
total internal reflection of light
Convex mirrors are used by doctors to examine oral cavity
Concave mirrors are used as reflectors
Convex mirrors are used as reflectors
Convex mirrors should be used for shaving
`-0.5` D
`2` D
`1` D
`-1.5` D
`20` cm
about `26` cm
`15` cm
`25` cm
1 and 3
2 and 3
1 and 2
All of these
when `u < 2f`
when `u > 2f`
for all values of ` u`
for no values of `u`
`4` cm
`8` cm
`12` cm
`32` cm
`+4 D`
`-4 D`
`+0.04 D`
`+0.004 D`
front surface silvered plane mirror
back surface silvered plane mirror
concave mirror
convex mirror
one concave mirror and one convex lens
two convex lenses of equal focal length
two concave mirrors of different focal lengths
two convex lenses of unequal focal lengths
spherical concave
plane
cylindrical
parabolic concave
dispersion of sunlight
reflection of sunlight
refraction of sunlight
total internal reflection of sunligllt
convex lens of focal length `2 rn`
convex lens of focal length `50 cm`
concave lens of focal length `2 m`
concave lens of focal length `50 crn`
real, inverted, same size at the focus
real, upright, same size at the focus
virtual, inverted, highly enlarged at infinity
real, inverted. highly enlarged at infinity
a straight or upright, real image of the object on the retina
an inverted, virtual image of the object on the retina
an inverted, real image of the object on the retina
a straight or upright, real image of the object on the iris
refractive index of glass for different colours of light is different
glass prism absorbs white light and emits lights of several colours in different directions
of total internal reflection of white light on surfaces of the prism
of the interference of different colours inside the prism
clensity of glass is higher than that of air
they cannot be reflected from a glass surface
glass absorbs energy from the light rays
speed of light in glass is less than the speed of light in air
during that time sun emits only reddish-orange light
all other colours are absorbed by the atmosphere
reddish-orange light is least scattered by the atmosphere
all other colours apart from reddish-orange are reflected back by the atmosphere
dispersion of sunlight from a wate droplet only
reflection of sunlight from a wate droplet only
reflection and rel'raction of sunlight from a water droplet only
refraction, dispersion and reflection of sunlight from a water droplet
real, inverted and magnified
real, erect and magnified
virtual, erect and reduced
virtual, erect and magnified
real and magnified
virtual and magnified
real and reduced
virtual and reduced
`40 cm`
`60 cm`
`80 cm`
`120 cm`
red light is least scattered by atmosphere
red light is most scattered by atmosphere
it is the colour of the Sun in the morning and evening
the Earth's atmosphere emits red light